# gimmecalc.com > Free online calculators — percentage, BMI, loan, tip, and other useful calculation tools. gimmecalc.com is a free calculator portal with 75 interactive tools. Each calculator runs in-browser with instant results — no signup required. ## Construction Category page: https://gimmecalc.com/construction-calculators ### Loose-Fill Insulation Calculator Calculate how many bags of loose-fill (blown-in) insulation you need for any area and depth, and find the R-value for mineral wool, cellulose, or EPS. URL: https://gimmecalc.com/loose-fill-insulation-calculator **Key formula**: Coverage at depth = bag coverage × (10 / target thickness in cm) Results are estimates based on typical material properties. Always verify bag coverage and R-values with the specific product's technical data sheet before purchasing. Related: [Paint calculator](https://gimmecalc.com/paint-calculator), [Tile Calculator](https://gimmecalc.com/tile-calculator), [Area converter](https://gimmecalc.com/area-converter), [Mortgage Calculator](https://gimmecalc.com/mortgage-amortization-schedule), [Percentage Calculator](https://gimmecalc.com/percentage-calculator) --- ### Paint calculator Calculate how much paint you need for a room. Enter room dimensions to find total wall area and the amount of paint required in liters. URL: https://gimmecalc.com/paint-calculator **Key formula**: Wall area = 2 × (length + width) × height Related: [Percentage Calculator](https://gimmecalc.com/percentage-calculator), [Tile Calculator](https://gimmecalc.com/tile-calculator), [Loose-Fill Insulation Calculator](https://gimmecalc.com/loose-fill-insulation-calculator), [Circle Area Calculator](https://gimmecalc.com/circle-area), [Length converter](https://gimmecalc.com/length-converter) --- ### Tile Calculator Calculate how many tiles you need for any floor or wall. Enter room and tile dimensions with a waste factor to get an instant tile count and room area. URL: https://gimmecalc.com/tile-calculator **Key formula**: Room area = room length × room width Related: [Paint calculator](https://gimmecalc.com/paint-calculator), [Loose-Fill Insulation Calculator](https://gimmecalc.com/loose-fill-insulation-calculator), [Area converter](https://gimmecalc.com/area-converter), [Percentage Calculator](https://gimmecalc.com/percentage-calculator), [Mortgage Calculator](https://gimmecalc.com/mortgage-amortization-schedule) --- ## Finance: Loans, interest, compound growth, mortgages, salary, tips Category page: https://gimmecalc.com/finance-calculators ### Compound growth calculator Calculate compound growth with periodic contributions. See how your investments or savings grow over time with the power of compounding. URL: https://gimmecalc.com/compound-growth-calculator **Key formula**: Final value = Initial value × (1 + growth rate)^periods This calculation is for illustrative purposes only. Actual results may vary depending on market conditions. This is not financial advice. Related: [Interest Calculator](https://gimmecalc.com/interest-calculator), [Loan Payment Calculator](https://gimmecalc.com/loan-calculator), [Savings Goal Calculator](https://gimmecalc.com/savings-goal-calculator), [Debt Payoff Calculator](https://gimmecalc.com/debt-payoff-calculator), [FIRE Calculator — Financial Independence](https://gimmecalc.com/fire-calculator) --- ### Debt Payoff Calculator Calculate how long it takes to pay off a debt or find the monthly payment needed to clear it by a target date. Enter balance, rate, and payment. URL: https://gimmecalc.com/debt-payoff-calculator **Key formula**: n = -ln(1 – P × r / M) / ln(1 + r) This calculator is for informational purposes only and does not constitute financial advice. Actual results depend on your lender's terms, compounding method, and any fees. Related: [Loan Payment Calculator](https://gimmecalc.com/loan-calculator), [Interest Calculator](https://gimmecalc.com/interest-calculator), [FIRE Calculator — Financial Independence](https://gimmecalc.com/fire-calculator), [Savings Goal Calculator](https://gimmecalc.com/savings-goal-calculator), [Compound growth calculator](https://gimmecalc.com/compound-growth-calculator) --- ### Discount calculator Calculate the final price after a percentage discount, how much you save, and the price per unit. Works for single items and bulk orders. URL: https://gimmecalc.com/discount-calculator **Key formula**: Discount = Price × (Discount percentage / 100) Related: [Percentage Calculator](https://gimmecalc.com/percentage-calculator), [Profit Margin Calculator](https://gimmecalc.com/profit-margin-calculator), [Interest Calculator](https://gimmecalc.com/interest-calculator), [Tip Calculator — Split Bills & Calculate Tips](https://gimmecalc.com/tip-calculator) --- ### FIRE Calculator — Financial Independence Calculate your FIRE number and years to financial independence. Enter current savings, monthly contributions, and expenses to find your FIRE date. URL: https://gimmecalc.com/fire-calculator **Key formula**: FIRE Number = Annual Expenses ÷ Safe Withdrawal Rate This calculator is for informational purposes only and does not constitute financial advice. Actual investment returns vary. Consult a financial advisor before making retirement planning decisions. Related: [Compound growth calculator](https://gimmecalc.com/compound-growth-calculator), [Savings Goal Calculator](https://gimmecalc.com/savings-goal-calculator), [Interest Calculator](https://gimmecalc.com/interest-calculator), [Debt Payoff Calculator](https://gimmecalc.com/debt-payoff-calculator) --- ### Interest Calculator Calculate simple and compound interest on your savings or investments. See how your money grows with annual, quarterly, monthly or daily compounding. URL: https://gimmecalc.com/interest-calculator **Key formula**: Interest = Principal × Annual rate × Time This calculation is for informational purposes only and does not constitute financial advice. Interest rates may change — always verify with official sources. Related: [Loan Payment Calculator](https://gimmecalc.com/loan-calculator), [Compound growth calculator](https://gimmecalc.com/compound-growth-calculator), [FIRE Calculator — Financial Independence](https://gimmecalc.com/fire-calculator), [Savings Goal Calculator](https://gimmecalc.com/savings-goal-calculator), [Debt Payoff Calculator](https://gimmecalc.com/debt-payoff-calculator) --- ### Loan Payment Calculator Calculate monthly payments, total interest, and repayment schedule for personal loans, car loans, and consumer credit. Not for mortgages. URL: https://gimmecalc.com/loan-calculator **Key formula**: M = P × r × (1+r)^n / ((1+r)^n – 1) This calculation is for informational purposes only and does not constitute financial advice. Actual loan terms depend on the lender and your financial situation. Related: [Mortgage Calculator](https://gimmecalc.com/mortgage-amortization-schedule), [Interest Calculator](https://gimmecalc.com/interest-calculator), [Compound growth calculator](https://gimmecalc.com/compound-growth-calculator), [Savings Goal Calculator](https://gimmecalc.com/savings-goal-calculator), [Debt Payoff Calculator](https://gimmecalc.com/debt-payoff-calculator) --- ### Mortgage Calculator Calculate your monthly mortgage payment and full amortization schedule. Enter home price, down payment percentage, interest rate, and loan term. URL: https://gimmecalc.com/mortgage-amortization-schedule **Key formula**: M = P × r × (1+r)ⁿ / ((1+r)ⁿ − 1) This calculator provides estimates for informational purposes only and does not constitute financial or mortgage advice. Actual mortgage terms, rates, and eligibility depend on the lender and your financial profile. Related: [Loan Payment Calculator](https://gimmecalc.com/loan-calculator), [Interest Calculator](https://gimmecalc.com/interest-calculator), [Compound growth calculator](https://gimmecalc.com/compound-growth-calculator), [Savings Goal Calculator](https://gimmecalc.com/savings-goal-calculator), [Debt Payoff Calculator](https://gimmecalc.com/debt-payoff-calculator) --- ### Profit Margin Calculator Calculate profit margin, markup, and selling price from cost. Essential for business pricing decisions and profitability analysis. URL: https://gimmecalc.com/profit-margin-calculator This calculator is for informational purposes only and does not constitute financial or business advice. Actual pricing decisions should consider market conditions, competition, and other business factors. Related: [Discount calculator](https://gimmecalc.com/discount-calculator), [Percentage Calculator](https://gimmecalc.com/percentage-calculator), [Interest Calculator](https://gimmecalc.com/interest-calculator), [Tip Calculator — Split Bills & Calculate Tips](https://gimmecalc.com/tip-calculator), [Loan Payment Calculator](https://gimmecalc.com/loan-calculator) --- ### Savings Goal Calculator Calculate how long it takes to reach your savings goal or find the monthly contribution needed to achieve your target amount by a specific date. URL: https://gimmecalc.com/savings-goal-calculator **Key formula**: n = log((FV × r + PMT) / (PV × r + PMT)) / log(1 + r) This calculator is for informational purposes only. Results are based on assumed inputs and may not reflect actual outcomes. Interest rates and market conditions can change. Consult a financial advisor for personalised advice. Related: [Compound growth calculator](https://gimmecalc.com/compound-growth-calculator), [Interest Calculator](https://gimmecalc.com/interest-calculator), [Loan Payment Calculator](https://gimmecalc.com/loan-calculator), [FIRE Calculator — Financial Independence](https://gimmecalc.com/fire-calculator), [Debt Payoff Calculator](https://gimmecalc.com/debt-payoff-calculator) --- ### Tip Calculator — Split Bills & Calculate Tips Calculate tips and split restaurant bills instantly — enter the bill amount, choose a tip percentage, and see the total and each person's share. URL: https://gimmecalc.com/tip-calculator **Key formula**: Tip = Bill amount × (Tip percentage / 100) Related: [Discount calculator](https://gimmecalc.com/discount-calculator), [Percentage Calculator](https://gimmecalc.com/percentage-calculator), [Profit Margin Calculator](https://gimmecalc.com/profit-margin-calculator), [Loan Payment Calculator](https://gimmecalc.com/loan-calculator) --- ## Health: BMI, calories, BMR, TDEE, pregnancy, water intake Category page: https://gimmecalc.com/health-calculators ### BAC calculator – Blood alcohol content Estimate your blood alcohol content (BAC) from the number of drinks, body weight, sex, and hours elapsed. Includes legal driving limits for your country. URL: https://gimmecalc.com/bac-calculator **Key formula**: BAC = (A / (r × W)) − (β × t) This calculator is for informational purposes only. Results are approximate and depend on many individual factors. Never drive if you are unsure about your sobriety. Related: [BMI calculator](https://gimmecalc.com/bmi-calculator), [Calorie calculator](https://gimmecalc.com/calorie-calculator), [Daily Water Intake Calculator](https://gimmecalc.com/water-intake-calculator), [Running pace calculator](https://gimmecalc.com/running-pace-calculator) --- ### BMI calculator Calculate your BMI from height and weight. Check if your body mass index falls within WHO's healthy range — underweight, normal, overweight, or obese. URL: https://gimmecalc.com/bmi-calculator **Key formula**: BMI = weight (kg) / height (m)² This calculator is for informational purposes only. BMI does not account for muscle mass, age or other individual factors. Always consult a healthcare professional for a personal health assessment. Related: [Ideal Weight Calculator by Height](https://gimmecalc.com/ideal-weight-calculator), [Calorie calculator](https://gimmecalc.com/calorie-calculator), [Calories Burned by Activity](https://gimmecalc.com/calories-burned-by-activity), [TDEE Calculator](https://gimmecalc.com/tdee-calculator), [BMR Calculator – Basal Metabolic Rate](https://gimmecalc.com/bmr-calculator) --- ### BMR Calculator – Basal Metabolic Rate Calculate your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor formula. Find out how many calories your body burns at rest each day. URL: https://gimmecalc.com/bmr-calculator This calculator provides an estimated BMR based on the Mifflin-St Jeor formula. Results are approximate — consult a healthcare professional or registered dietitian for personalised nutrition planning. Related: [TDEE Calculator](https://gimmecalc.com/tdee-calculator), [BMI calculator](https://gimmecalc.com/bmi-calculator), [Calorie calculator](https://gimmecalc.com/calorie-calculator), [Calories Burned by Activity](https://gimmecalc.com/calories-burned-by-activity), [Daily Water Intake Calculator](https://gimmecalc.com/water-intake-calculator) --- ### Calorie calculator Calculate your daily calorie needs and basal metabolic rate (BMR) based on age, weight, height and activity level. Start eating smarter today. URL: https://gimmecalc.com/calorie-calculator This calculator is for informational purposes only. Results are approximate and do not replace professional dietary advice from a qualified nutritionist. Related: [BMI calculator](https://gimmecalc.com/bmi-calculator), [Calories Burned by Activity](https://gimmecalc.com/calories-burned-by-activity), [Running pace calculator](https://gimmecalc.com/running-pace-calculator), [TDEE Calculator](https://gimmecalc.com/tdee-calculator), [BMR Calculator – Basal Metabolic Rate](https://gimmecalc.com/bmr-calculator) --- ### Calories Burned by Activity Calculate calories burned by activity, weight, and duration. Uses MET values for running, swimming, cycling, yoga, and more. URL: https://gimmecalc.com/calories-burned-by-activity This calculator provides an estimate of calories burned based on MET (Metabolic Equivalent of Task) values. Actual calorie expenditure varies based on individual factors such as age, fitness level, and body composition. Consult a healthcare professional for personalized nutrition or exercise advice. Related: [Calorie calculator](https://gimmecalc.com/calorie-calculator), [TDEE Calculator](https://gimmecalc.com/tdee-calculator), [BMI calculator](https://gimmecalc.com/bmi-calculator), [Running pace calculator](https://gimmecalc.com/running-pace-calculator), [One Rep Max (1RM) Calculator](https://gimmecalc.com/one-rep-max-calculator) --- ### Daily Water Intake Calculator Calculate how much water you should drink per day based on your weight, activity level and climate. Results shown in litres and glasses. URL: https://gimmecalc.com/water-intake-calculator **Key formula**: Daily intake = weight × 33 ml × activity multiplier × climate multiplier This calculator is for informational purposes only. Water needs depend on many individual factors. Consult a healthcare professional for personalised hydration advice. Related: [Calorie calculator](https://gimmecalc.com/calorie-calculator), [BMI calculator](https://gimmecalc.com/bmi-calculator), [Sleep Cycle Calculator](https://gimmecalc.com/sleep-cycle-calculator), [TDEE Calculator](https://gimmecalc.com/tdee-calculator), [Pregnancy weight gain calculator](https://gimmecalc.com/pregnancy-weight-gain-calculator) --- ### Ideal Weight Calculator by Height How much should I weigh? Calculate your ideal weight by height and sex using 4 proven formulas: Robinson, Devine, Miller and Hamwi — plus healthy BMI range. URL: https://gimmecalc.com/ideal-weight-calculator This calculator is for informational purposes only. Ideal weight is an estimate and depends on muscle mass, age, bone structure, and other individual factors. Consult a healthcare professional for a personal health assessment. Related: [BMI calculator](https://gimmecalc.com/bmi-calculator), [BMR Calculator – Basal Metabolic Rate](https://gimmecalc.com/bmr-calculator), [Calorie calculator](https://gimmecalc.com/calorie-calculator), [TDEE Calculator](https://gimmecalc.com/tdee-calculator), [Running pace calculator](https://gimmecalc.com/running-pace-calculator) --- ### Maximum Heart Rate Calculator Calculate your maximum heart rate by age with the 220−age or Tanaka formula and see all five heart rate training zones instantly. URL: https://gimmecalc.com/max-heart-rate-calculator **Key formula**: Classic formula (Fox, 1971): HRmax = 220 − age Maximum heart rate estimates are based on population averages and may vary by ±10–20 bpm. Consult a healthcare professional before starting a new or high-intensity exercise program. Related: [Running pace calculator](https://gimmecalc.com/running-pace-calculator), [One Rep Max (1RM) Calculator](https://gimmecalc.com/one-rep-max-calculator), [Calorie calculator](https://gimmecalc.com/calorie-calculator), [BMR Calculator – Basal Metabolic Rate](https://gimmecalc.com/bmr-calculator), [BMI calculator](https://gimmecalc.com/bmi-calculator) --- ### Ovulation Calculator Calculate your ovulation date, fertile window, and next period from your last menstrual period and cycle length — so you know your most fertile days. URL: https://gimmecalc.com/ovulation-calculator **Key formula**: Ovulation date = Last menstrual period + (cycle length – 14) days This calculator is for informational purposes only. The ovulation date is approximate and may vary depending on individual factors. Always consult your doctor for a more accurate fertility assessment. Related: [Pregnancy due date calculator](https://gimmecalc.com/pregnancy-calculator), [Pregnancy weight gain calculator](https://gimmecalc.com/pregnancy-weight-gain-calculator), [Date Calculator — Days Between Dates](https://gimmecalc.com/date-calculator), [Age Calculator](https://gimmecalc.com/age-calculator) --- ### Pregnancy due date calculator Calculate your estimated due date based on your last menstrual period. Shows current pregnancy week, trimester, and days remaining to term. URL: https://gimmecalc.com/pregnancy-calculator **Key formula**: Due date = Last menstrual period date + 280 days This calculator is for informational purposes only. The estimated due date is approximate. Always consult your doctor for a more accurate pregnancy assessment. Related: [Ovulation Calculator](https://gimmecalc.com/ovulation-calculator), [Date Calculator — Days Between Dates](https://gimmecalc.com/date-calculator), [Age Calculator](https://gimmecalc.com/age-calculator), [Calorie calculator](https://gimmecalc.com/calorie-calculator), [Pregnancy weight gain calculator](https://gimmecalc.com/pregnancy-weight-gain-calculator) --- ### Pregnancy weight gain calculator Track whether your pregnancy weight gain is on target. Based on IOM guidelines for your pre-pregnancy BMI category. Covers all trimesters. URL: https://gimmecalc.com/pregnancy-weight-gain-calculator **Key formula**: Recommended minimum = 0.5 kg + (W − 13) × weekly minimum rate This calculator is for informational purposes only and is based on the Institute of Medicine (IOM) 2009 guidelines for singleton pregnancies. Every pregnancy is individual. Always consult your doctor or midwife for personalised recommendations. Related: [BMI calculator](https://gimmecalc.com/bmi-calculator), [Pregnancy due date calculator](https://gimmecalc.com/pregnancy-calculator), [Calorie calculator](https://gimmecalc.com/calorie-calculator), [Daily Water Intake Calculator](https://gimmecalc.com/water-intake-calculator), [BMR Calculator – Basal Metabolic Rate](https://gimmecalc.com/bmr-calculator) --- ### Sleep Cycle Calculator Find the best bedtime based on your wake-up time. Align sleep with 90-minute sleep cycles to wake refreshed and avoid morning grogginess. URL: https://gimmecalc.com/sleep-cycle-calculator **Key formula**: Bedtime = Wake-up time − (Number of cycles × 90 min) − 14 min. This calculator provides general sleep recommendations and is not a substitute for professional medical advice. If you have persistent sleep difficulties, consult a healthcare provider. Related: [BMI calculator](https://gimmecalc.com/bmi-calculator), [Daily Water Intake Calculator](https://gimmecalc.com/water-intake-calculator), [TDEE Calculator](https://gimmecalc.com/tdee-calculator), [Calorie calculator](https://gimmecalc.com/calorie-calculator), [Time Calculator — Add & Subtract Hours & Minutes](https://gimmecalc.com/time-calculator) --- ### TDEE Calculator Calculate your TDEE — total daily energy expenditure based on weight, height, age, sex, and activity level. Get calorie goals for weight loss or gain. URL: https://gimmecalc.com/tdee-calculator This calculator is for informational purposes only. Consult a doctor or nutritionist before making dietary changes. Related: [Calorie calculator](https://gimmecalc.com/calorie-calculator), [BMI calculator](https://gimmecalc.com/bmi-calculator), [Calories Burned by Activity](https://gimmecalc.com/calories-burned-by-activity), [Running pace calculator](https://gimmecalc.com/running-pace-calculator), [BMR Calculator – Basal Metabolic Rate](https://gimmecalc.com/bmr-calculator) --- ## Math: Percentages, averages, statistics, geometry, number tools Category page: https://gimmecalc.com/math-calculators ### Circle Area Calculator Calculate the area, circumference and diameter of a circle from its radius or diameter. Useful for round tables, pools, lawns and geometry problems. URL: https://gimmecalc.com/circle-area Related: [Triangle calculator](https://gimmecalc.com/triangle-calculator), [Area converter](https://gimmecalc.com/area-converter), [Pythagorean Theorem Calculator](https://gimmecalc.com/pythagorean-theorem-calculator), [Percentage Calculator](https://gimmecalc.com/percentage-calculator), [Cylinder Volume & Surface Area Calculator](https://gimmecalc.com/cylinder-calculator) --- ### Cylinder Volume & Surface Area Calculator Calculate the volume, total surface area, lateral surface area and base area of a cylinder by entering its radius and height. URL: https://gimmecalc.com/cylinder-calculator **Key formula**: V = π × r² × h Related: [Circle Area Calculator](https://gimmecalc.com/circle-area), [Triangle calculator](https://gimmecalc.com/triangle-calculator), [Volume converter](https://gimmecalc.com/volume-converter), [Sphere Volume and Surface Area Calculator](https://gimmecalc.com/sphere-calculator), [Fraction calculator](https://gimmecalc.com/fraction-calculator) --- ### Fraction calculator Add, subtract, multiply and divide fractions with step-by-step solutions. Simplify fractions and convert between mixed numbers and improper fractions. URL: https://gimmecalc.com/fraction-calculator Related: [Percentage Calculator](https://gimmecalc.com/percentage-calculator), [Mean, Median, Mode Calculator](https://gimmecalc.com/mean-median-mode-calculator), [Time Calculator — Add & Subtract Hours & Minutes](https://gimmecalc.com/time-calculator), [Scientific Calculator](https://gimmecalc.com/scientific-calculator), [Triangle calculator](https://gimmecalc.com/triangle-calculator), [Recipe Scaler](https://gimmecalc.com/recipe-scaler) --- ### GPA Calculator Calculate your semester or cumulative GPA on a 4.0 scale with letter grades and credit hours to track your academic progress. URL: https://gimmecalc.com/gpa-calculator **Key formula**: GPA = Total Quality Points / Total Credit Hours Related: [Percentage Calculator](https://gimmecalc.com/percentage-calculator), [Mean, Median, Mode Calculator](https://gimmecalc.com/mean-median-mode-calculator), [Z-Score Calculator](https://gimmecalc.com/z-score-calculator), [Fraction calculator](https://gimmecalc.com/fraction-calculator), [Scientific Calculator](https://gimmecalc.com/scientific-calculator) --- ### Mean, Median, Mode Calculator Calculate mean, median, and mode for any set of numbers. Also computes sum, range, minimum, maximum, and other descriptive statistics. URL: https://gimmecalc.com/mean-median-mode-calculator **Key formula**: Mean = (x₁ + x₂ + ... + xₙ) / n Related: [Percentage Calculator](https://gimmecalc.com/percentage-calculator), [Fraction calculator](https://gimmecalc.com/fraction-calculator), [GPA Calculator](https://gimmecalc.com/gpa-calculator), [Z-Score Calculator](https://gimmecalc.com/z-score-calculator), [Triangle calculator](https://gimmecalc.com/triangle-calculator) --- ### Percentage Calculator Calculate percentages quickly and accurately. Find what percent a number is, compute percentage change, increase or decrease — all in one place. URL: https://gimmecalc.com/percentage-calculator **Key formula**: Percentage = (Part / Whole) × 100 Related: [Fraction calculator](https://gimmecalc.com/fraction-calculator), [Tip Calculator — Split Bills & Calculate Tips](https://gimmecalc.com/tip-calculator), [Profit Margin Calculator](https://gimmecalc.com/profit-margin-calculator), [GPA Calculator](https://gimmecalc.com/gpa-calculator), [Discount calculator](https://gimmecalc.com/discount-calculator) --- ### Pythagorean Theorem Calculator Calculate the missing side of a right triangle using the Pythagorean theorem. Solve for hypotenuse, side a, or side b instantly. URL: https://gimmecalc.com/pythagorean-theorem-calculator **Key formula**: a² + b² = c² Related: [Triangle calculator](https://gimmecalc.com/triangle-calculator), [Circle Area Calculator](https://gimmecalc.com/circle-area), [Sphere Volume and Surface Area Calculator](https://gimmecalc.com/sphere-calculator), [Percentage Calculator](https://gimmecalc.com/percentage-calculator), [Scientific Calculator](https://gimmecalc.com/scientific-calculator) --- ### Scientific Calculator Solve trigonometry, logarithms, powers, and factorials with a scientific calculator supporting sin, cos, tan, log, ln, π, and e in degree or radian mode. URL: https://gimmecalc.com/scientific-calculator **Key formula**: Area of a circle (r=5): Related: [Fraction calculator](https://gimmecalc.com/fraction-calculator), [Percentage Calculator](https://gimmecalc.com/percentage-calculator), [Triangle calculator](https://gimmecalc.com/triangle-calculator), [Pythagorean Theorem Calculator](https://gimmecalc.com/pythagorean-theorem-calculator), [Sphere Volume and Surface Area Calculator](https://gimmecalc.com/sphere-calculator) --- ### Sphere Volume and Surface Area Calculator Calculate the volume and surface area of any sphere by entering its radius. Instant results using V = (4/3)πr³ and A = 4πr². URL: https://gimmecalc.com/sphere-calculator **Key formula**: V = (4/3) × π × r³ Related: [Cylinder Volume & Surface Area Calculator](https://gimmecalc.com/cylinder-calculator), [Circle Area Calculator](https://gimmecalc.com/circle-area), [Triangle calculator](https://gimmecalc.com/triangle-calculator), [Volume converter](https://gimmecalc.com/volume-converter), [Pythagorean Theorem Calculator](https://gimmecalc.com/pythagorean-theorem-calculator) --- ### Triangle calculator Triangle calculator – calculate area, perimeter, and angles. Uses Heron's formula, law of cosines, law of sines, and base-height method. URL: https://gimmecalc.com/triangle-calculator Related: [Scientific Calculator](https://gimmecalc.com/scientific-calculator), [Angle converter](https://gimmecalc.com/angle-converter), [Pythagorean Theorem Calculator](https://gimmecalc.com/pythagorean-theorem-calculator), [Cylinder Volume & Surface Area Calculator](https://gimmecalc.com/cylinder-calculator), [Circle Area Calculator](https://gimmecalc.com/circle-area) --- ### Z-Score Calculator Calculate the Z-score from a value, mean, and standard deviation, or convert a Z-score to a cumulative probability and percentile. URL: https://gimmecalc.com/z-score-calculator **Key formula**: Z = (x − μ) / σ Related: [Mean, Median, Mode Calculator](https://gimmecalc.com/mean-median-mode-calculator), [Percentage Calculator](https://gimmecalc.com/percentage-calculator), [Fraction calculator](https://gimmecalc.com/fraction-calculator), [Triangle calculator](https://gimmecalc.com/triangle-calculator), [Scientific Calculator](https://gimmecalc.com/scientific-calculator) --- ## Sports: Running pace, race predictions, step counting, training zones Category page: https://gimmecalc.com/sports-calculators ### One Rep Max (1RM) Calculator Calculate your one rep max (1RM) based on the weight lifted and number of repetitions using 5 proven strength training formulas. URL: https://gimmecalc.com/one-rep-max-calculator Results are approximate estimates for informational purposes only. Consult a qualified trainer before starting a new training program. Related: [BMI calculator](https://gimmecalc.com/bmi-calculator), [Calorie calculator](https://gimmecalc.com/calorie-calculator), [Running pace calculator](https://gimmecalc.com/running-pace-calculator), [TDEE Calculator](https://gimmecalc.com/tdee-calculator), [Maximum Heart Rate Calculator](https://gimmecalc.com/max-heart-rate-calculator) --- ### Race Time Predictor Predict your finish time for any race distance based on a previous result. Uses the Riegel formula to estimate pace and finish time. URL: https://gimmecalc.com/race-time-predictor Related: [Running pace calculator](https://gimmecalc.com/running-pace-calculator), [Calorie calculator](https://gimmecalc.com/calorie-calculator), [BMI calculator](https://gimmecalc.com/bmi-calculator), [TDEE Calculator](https://gimmecalc.com/tdee-calculator), [Calories Burned by Activity](https://gimmecalc.com/calories-burned-by-activity) --- ### Running pace calculator Calculate your running pace, finish time, or distance. Enter any two values and get the third instantly. Supports km pace and speed. URL: https://gimmecalc.com/running-pace-calculator **Key formula**: Pace = Total time ÷ Distance Related: [Calorie calculator](https://gimmecalc.com/calorie-calculator), [BMI calculator](https://gimmecalc.com/bmi-calculator), [Calories Burned by Activity](https://gimmecalc.com/calories-burned-by-activity), [TDEE Calculator](https://gimmecalc.com/tdee-calculator), [Maximum Heart Rate Calculator](https://gimmecalc.com/max-heart-rate-calculator) --- ### Ski Binding DIN Calculator Calculate your ski binding DIN release value by weight, height, age, and skier type. Based on the ISO 11088 standard lookup tables. URL: https://gimmecalc.com/ski-binding-din-calculator This calculator provides an estimated DIN setting for reference only. Always have ski bindings mounted, checked, and adjusted by a certified ski technician before use. Related: [Ski Size Calculator](https://gimmecalc.com/ski-size-calculator), [BMI calculator](https://gimmecalc.com/bmi-calculator), [One Rep Max (1RM) Calculator](https://gimmecalc.com/one-rep-max-calculator), [Calorie calculator](https://gimmecalc.com/calorie-calculator), [Running pace calculator](https://gimmecalc.com/running-pace-calculator) --- ### Ski Size Calculator Calculate the recommended ski length based on your height, weight, skiing ability and ski type. Covers alpine, freeride, freestyle and race skis. URL: https://gimmecalc.com/ski-size-calculator Recommendations are approximate. For the most accurate ski sizing, consult a professional ski equipment specialist. Related: [Running pace calculator](https://gimmecalc.com/running-pace-calculator), [BMI calculator](https://gimmecalc.com/bmi-calculator), [Calorie calculator](https://gimmecalc.com/calorie-calculator), [Ski Binding DIN Calculator](https://gimmecalc.com/ski-binding-din-calculator), [Shoe size converter – EU, US, UK & CM](https://gimmecalc.com/shoe-size-converter) --- ## Fun: Random generators, name pickers, dice, love compatibility Category page: https://gimmecalc.com/fun-calculators ### Age Calculator Calculate your exact age in years, months, and days from any date of birth. Instantly see total days lived, weeks, and days until your next birthday. URL: https://gimmecalc.com/age-calculator Related: [Pet Age Calculator](https://gimmecalc.com/pet-age-calculator), [Love Calculator](https://gimmecalc.com/love-calculator), [Date Calculator — Days Between Dates](https://gimmecalc.com/date-calculator), [Pregnancy due date calculator](https://gimmecalc.com/pregnancy-calculator), [Generation calculator](https://gimmecalc.com/generation-calculator) --- ### Generation calculator Find out which generation you belong to based on your birth year. From the Greatest Generation to Gen Alpha and Gen Beta — discover yours instantly. URL: https://gimmecalc.com/generation-calculator Related: [Age Calculator](https://gimmecalc.com/age-calculator), [Pet Age Calculator](https://gimmecalc.com/pet-age-calculator), [Zodiac Compatibility Calculator](https://gimmecalc.com/zodiac-compatibility), [Love Calculator](https://gimmecalc.com/love-calculator), [Date Calculator — Days Between Dates](https://gimmecalc.com/date-calculator) --- ### Love Calculator Find out your love compatibility percentage based on two names — a fun entertainment calculator using the classic LOVES algorithm to share with friends. URL: https://gimmecalc.com/love-calculator Related: [Age Calculator](https://gimmecalc.com/age-calculator), [Pet Age Calculator](https://gimmecalc.com/pet-age-calculator), [Generation calculator](https://gimmecalc.com/generation-calculator), [Zodiac Compatibility Calculator](https://gimmecalc.com/zodiac-compatibility) --- ### Pet Age Calculator Convert your dog or cat's age to equivalent human years using veterinarian-recommended formulas adjusted for breed size and species. URL: https://gimmecalc.com/pet-age-calculator Related: [Age Calculator](https://gimmecalc.com/age-calculator), [Love Calculator](https://gimmecalc.com/love-calculator), [Date Calculator — Days Between Dates](https://gimmecalc.com/date-calculator), [Generation calculator](https://gimmecalc.com/generation-calculator), [Zodiac Compatibility Calculator](https://gimmecalc.com/zodiac-compatibility) --- ### Random Number Generator Generate random integers instantly. Set a minimum and maximum range, choose how many numbers to generate, and copy the results to clipboard. URL: https://gimmecalc.com/random-number-generator Related: [UUID Generator](https://gimmecalc.com/uuid-generator), [Password generator](https://gimmecalc.com/password-generator), [Mean, Median, Mode Calculator](https://gimmecalc.com/mean-median-mode-calculator), [Love Calculator](https://gimmecalc.com/love-calculator), [Zodiac Compatibility Calculator](https://gimmecalc.com/zodiac-compatibility) --- ### Zodiac Compatibility Calculator Find out how well your zodiac sign matches another based on element astrology. Compare fire, earth, air, and water sign compatibility. URL: https://gimmecalc.com/zodiac-compatibility This calculator is for entertainment purposes only. Zodiac compatibility has no scientific basis — real relationship success depends on many factors the stars cannot predict. Related: [Love Calculator](https://gimmecalc.com/love-calculator), [Age Calculator](https://gimmecalc.com/age-calculator), [Pet Age Calculator](https://gimmecalc.com/pet-age-calculator), [Generation calculator](https://gimmecalc.com/generation-calculator), [Date Calculator — Days Between Dates](https://gimmecalc.com/date-calculator) --- ## Utility: Time, dates, age, fuel cost, password generation Category page: https://gimmecalc.com/utility-tools ### Date Calculator — Days Between Dates Calculate the number of days, weeks, months and years between two dates. Perfect for project deadlines, countdown timers and event planning. URL: https://gimmecalc.com/date-calculator Related: [Age Calculator](https://gimmecalc.com/age-calculator), [Pregnancy due date calculator](https://gimmecalc.com/pregnancy-calculator), [Ovulation Calculator](https://gimmecalc.com/ovulation-calculator), [Percentage Calculator](https://gimmecalc.com/percentage-calculator), [Time Calculator — Add & Subtract Hours & Minutes](https://gimmecalc.com/time-calculator) --- ### Password generator Generate strong, random passwords with custom length and character options. Includes a password strength indicator to verify your account security. URL: https://gimmecalc.com/password-generator Related: [Word & Character Counter](https://gimmecalc.com/word-and-character-counter), [Number base converter](https://gimmecalc.com/number-base-converter), [Random Number Generator](https://gimmecalc.com/random-number-generator), [Color Converter](https://gimmecalc.com/color-converter), [UUID Generator](https://gimmecalc.com/uuid-generator) --- ### Recipe Scaler Scale any recipe up or down instantly. Enter your servings and ingredient list — the recipe scaler adjusts every quantity automatically. URL: https://gimmecalc.com/recipe-scaler Related: [Cooking Unit Converter](https://gimmecalc.com/cooking-unit-converter), [Fraction calculator](https://gimmecalc.com/fraction-calculator), [Weight converter](https://gimmecalc.com/weight-converter), [Volume converter](https://gimmecalc.com/volume-converter) --- ### Time Calculator — Add & Subtract Hours & Minutes Add or subtract hours, minutes and seconds instantly. Perfect for work hours, shift totals and running split times. Shows total in decimal hours for payroll. URL: https://gimmecalc.com/time-calculator **Key formula**: days = floor(seconds ÷ 86400) Related: [Date Calculator — Days Between Dates](https://gimmecalc.com/date-calculator), [Time converter](https://gimmecalc.com/time-converter), [Sleep Cycle Calculator](https://gimmecalc.com/sleep-cycle-calculator), [Running pace calculator](https://gimmecalc.com/running-pace-calculator), [Fraction calculator](https://gimmecalc.com/fraction-calculator) --- ### UUID Generator Generate random UUID v4 identifiers instantly. Create one or up to 100 unique UUIDs in a single click and copy them to clipboard. URL: https://gimmecalc.com/uuid-generator Related: [Password generator](https://gimmecalc.com/password-generator), [Number base converter](https://gimmecalc.com/number-base-converter), [Color Converter](https://gimmecalc.com/color-converter), [Word & Character Counter](https://gimmecalc.com/word-and-character-counter), [Data storage converter](https://gimmecalc.com/data-storage-converter) --- ### Word & Character Counter Count words, characters, sentences and paragraphs in your text instantly. Shows reading time and character count with and without spaces. URL: https://gimmecalc.com/word-and-character-counter Related: [Mean, Median, Mode Calculator](https://gimmecalc.com/mean-median-mode-calculator), [Percentage Calculator](https://gimmecalc.com/percentage-calculator), [Fraction calculator](https://gimmecalc.com/fraction-calculator), [Number base converter](https://gimmecalc.com/number-base-converter), [Password generator](https://gimmecalc.com/password-generator) --- ## Converters: Length, weight, temperature, area, volume, speed, data Category page: https://gimmecalc.com/converters ### Angle converter Convert angle units: degrees, radians, gradians, arcminutes, arcseconds and turns. Fast and accurate angle unit conversion online. URL: https://gimmecalc.com/angle-converter Related: [Length converter](https://gimmecalc.com/length-converter), [Area converter](https://gimmecalc.com/area-converter), [Triangle calculator](https://gimmecalc.com/triangle-calculator) --- ### Area converter Convert between square meters, hectares, acres, square feet and more. Includes conversion formulas and real-world area examples. URL: https://gimmecalc.com/area-converter **Key formula**: 1 square meter = 10,000 cm² = 10.7639 sq ft Related: [Length converter](https://gimmecalc.com/length-converter), [Volume converter](https://gimmecalc.com/volume-converter), [Paint calculator](https://gimmecalc.com/paint-calculator), [Tile Calculator](https://gimmecalc.com/tile-calculator), [Loose-Fill Insulation Calculator](https://gimmecalc.com/loose-fill-insulation-calculator) --- ### Color Converter Convert colors between RGB, HEX, HSL and CMYK formats instantly. Essential for web designers, front-end developers and print professionals. URL: https://gimmecalc.com/color-converter Related: [Temperature converter](https://gimmecalc.com/temperature-converter), [Length converter](https://gimmecalc.com/length-converter), [Number base converter](https://gimmecalc.com/number-base-converter), [Password generator](https://gimmecalc.com/password-generator), [UUID Generator](https://gimmecalc.com/uuid-generator) --- ### Cooking Unit Converter Convert cooking measurements instantly: teaspoons, tablespoons, cups, fluid ounces, milliliters, and liters with this easy kitchen converter. URL: https://gimmecalc.com/cooking-unit-converter Related: [Volume converter](https://gimmecalc.com/volume-converter), [Weight converter](https://gimmecalc.com/weight-converter), [Temperature converter](https://gimmecalc.com/temperature-converter), [Calorie calculator](https://gimmecalc.com/calorie-calculator), [Recipe Scaler](https://gimmecalc.com/recipe-scaler) --- ### Data storage converter Convert data storage units: bytes, kilobytes, megabytes, gigabytes and terabytes. Fast and accurate data storage unit conversion online. URL: https://gimmecalc.com/data-storage-converter Related: [Frequency converter](https://gimmecalc.com/frequency-converter), [Energy converter](https://gimmecalc.com/energy-converter), [Number base converter](https://gimmecalc.com/number-base-converter), [Data transfer rate converter](https://gimmecalc.com/data-transfer-rate-converter), [UUID Generator](https://gimmecalc.com/uuid-generator) --- ### Data transfer rate converter Convert data transfer rate units: bps, Kbps, Mbps, Gbps and Tbps. Fast and accurate internet speed unit conversion online. URL: https://gimmecalc.com/data-transfer-rate-converter Related: [Data storage converter](https://gimmecalc.com/data-storage-converter), [Frequency converter](https://gimmecalc.com/frequency-converter), [Time converter](https://gimmecalc.com/time-converter) --- ### Energy converter Convert energy units: joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours and BTU. Fast and accurate energy unit conversion online. URL: https://gimmecalc.com/energy-converter Related: [Pressure converter](https://gimmecalc.com/pressure-converter), [Power converter](https://gimmecalc.com/power-converter), [Torque converter](https://gimmecalc.com/torque-converter) --- ### Force converter Convert force units: newtons, kilonewtons, pound-force, dynes and kilogram-force. Fast and accurate force unit conversion online. URL: https://gimmecalc.com/force-converter Related: [Pressure converter](https://gimmecalc.com/pressure-converter), [Energy converter](https://gimmecalc.com/energy-converter), [Torque converter](https://gimmecalc.com/torque-converter) --- ### Frequency converter Convert frequency units: hertz, kilohertz, megahertz, gigahertz and RPM. Fast and accurate frequency unit conversion online. URL: https://gimmecalc.com/frequency-converter Related: [Time converter](https://gimmecalc.com/time-converter), [Energy converter](https://gimmecalc.com/energy-converter), [Number base converter](https://gimmecalc.com/number-base-converter), [Data transfer rate converter](https://gimmecalc.com/data-transfer-rate-converter) --- ### Length converter Convert length units: meters, centimeters, inches, feet, yards, kilometers and miles. Fast and accurate length unit conversion online. URL: https://gimmecalc.com/length-converter Related: [Weight converter](https://gimmecalc.com/weight-converter), [Area converter](https://gimmecalc.com/area-converter), [Speed converter](https://gimmecalc.com/speed-converter), [Shoe size converter – EU, US, UK & CM](https://gimmecalc.com/shoe-size-converter), [Angle converter](https://gimmecalc.com/angle-converter) --- ### Number base converter Convert numbers between binary, octal, decimal, hexadecimal, Base32 and Base64 systems. Fast and accurate number base conversion tool online. URL: https://gimmecalc.com/number-base-converter Related: [Data storage converter](https://gimmecalc.com/data-storage-converter), [Percentage Calculator](https://gimmecalc.com/percentage-calculator), [Fraction calculator](https://gimmecalc.com/fraction-calculator), [Roman Numeral Converter](https://gimmecalc.com/roman-numerals), [Password generator](https://gimmecalc.com/password-generator) --- ### Power converter Convert power units: watts, kilowatts, horsepower, BTU/h and more. Fast and accurate power unit conversion for cars, appliances and HVAC. URL: https://gimmecalc.com/power-converter Related: [Speed converter](https://gimmecalc.com/speed-converter), [Temperature converter](https://gimmecalc.com/temperature-converter), [Area converter](https://gimmecalc.com/area-converter), [Energy converter](https://gimmecalc.com/energy-converter), [Torque converter](https://gimmecalc.com/torque-converter) --- ### Pressure converter Convert pressure units: pascals, hectopascals, kilopascals, bars, atmospheres, PSI and mmHg. Fast and accurate pressure unit conversion online. URL: https://gimmecalc.com/pressure-converter Related: [Energy converter](https://gimmecalc.com/energy-converter), [Force converter](https://gimmecalc.com/force-converter), [Area converter](https://gimmecalc.com/area-converter), [Length converter](https://gimmecalc.com/length-converter), [Temperature converter](https://gimmecalc.com/temperature-converter) --- ### Roman Numeral Converter Convert numbers between Roman and Arabic numerals instantly. Supports all standard values from I to MMMCMXCIX (1–3999) with conversion steps. URL: https://gimmecalc.com/roman-numerals Related: [Number base converter](https://gimmecalc.com/number-base-converter), [Fraction calculator](https://gimmecalc.com/fraction-calculator), [Percentage Calculator](https://gimmecalc.com/percentage-calculator), [Word & Character Counter](https://gimmecalc.com/word-and-character-counter), [Password generator](https://gimmecalc.com/password-generator) --- ### Shoe size converter – EU, US, UK & CM Convert shoe sizes between EU, US Men, US Women, UK, and CM. Enter any size and instantly see the equivalent in all other sizing systems. URL: https://gimmecalc.com/shoe-size-converter Shoe size conversions are approximate and based on standard international sizing charts. Actual fit may vary between brands and shoe styles. Always check the specific brand's size guide before purchasing. Related: [Length converter](https://gimmecalc.com/length-converter), [BMI calculator](https://gimmecalc.com/bmi-calculator), [Ideal Weight Calculator by Height](https://gimmecalc.com/ideal-weight-calculator), [Ski Size Calculator](https://gimmecalc.com/ski-size-calculator), [Weight converter](https://gimmecalc.com/weight-converter) --- ### Speed converter Convert speed units: km/h, mph, m/s, knots and more. Fast and accurate speed conversion for driving, sports, aviation and science. URL: https://gimmecalc.com/speed-converter Related: [Length converter](https://gimmecalc.com/length-converter), [Temperature converter](https://gimmecalc.com/temperature-converter), [Running pace calculator](https://gimmecalc.com/running-pace-calculator) --- ### Temperature converter Convert temperature units: Celsius, Fahrenheit and Kelvin. Fast and accurate temperature conversion for travel, cooking, science and more. URL: https://gimmecalc.com/temperature-converter Related: [Speed converter](https://gimmecalc.com/speed-converter), [Power converter](https://gimmecalc.com/power-converter), [Length converter](https://gimmecalc.com/length-converter), [Color Converter](https://gimmecalc.com/color-converter), [Cooking Unit Converter](https://gimmecalc.com/cooking-unit-converter) --- ### Time converter Convert time units: milliseconds, seconds, minutes, hours, days and weeks. Fast and accurate time unit conversion online. URL: https://gimmecalc.com/time-converter Related: [Frequency converter](https://gimmecalc.com/frequency-converter), [Speed converter](https://gimmecalc.com/speed-converter), [Data transfer rate converter](https://gimmecalc.com/data-transfer-rate-converter), [Time Calculator — Add & Subtract Hours & Minutes](https://gimmecalc.com/time-calculator) --- ### Torque converter Convert torque units: newton-meters, foot-pounds, kilogram-force meters, inch-pounds and dyne-centimeters. Accurate torque conversion online. URL: https://gimmecalc.com/torque-converter Related: [Force converter](https://gimmecalc.com/force-converter), [Energy converter](https://gimmecalc.com/energy-converter), [Power converter](https://gimmecalc.com/power-converter) --- ### Volume converter Convert volume units: liters, milliliters, gallons, pints, cups and cubic meters. Fast and accurate volume unit conversion online. URL: https://gimmecalc.com/volume-converter Related: [Weight converter](https://gimmecalc.com/weight-converter), [Length converter](https://gimmecalc.com/length-converter), [Area converter](https://gimmecalc.com/area-converter), [Paint calculator](https://gimmecalc.com/paint-calculator), [Cylinder Volume & Surface Area Calculator](https://gimmecalc.com/cylinder-calculator) --- ### Weight converter Convert weight units: kilograms, grams, pounds, ounces, tons and milligrams. Fast and accurate weight and mass unit conversion online. URL: https://gimmecalc.com/weight-converter Related: [Length converter](https://gimmecalc.com/length-converter), [Volume converter](https://gimmecalc.com/volume-converter), [BMI calculator](https://gimmecalc.com/bmi-calculator), [Calorie calculator](https://gimmecalc.com/calorie-calculator), [Cooking Unit Converter](https://gimmecalc.com/cooking-unit-converter) --- ## Optional ### Embedding Every calculator can be embedded on any website: - oEmbed endpoint: `https://gimmecalc.com/oembed?url=https://gimmecalc.com/embed/{calculator-slug}/&format=json` - Embed manifest: https://gimmecalc.com/oembed-manifest.json ### Pre-filling Calculators Any calculator can be pre-filled by adding query parameters to the URL. The parameter names match the calculator's input fields. Example — pre-fill a loan calculator: When all required fields are filled via URL, the calculator shows results immediately on load. ### Other languages - [Lietuva](https://skaiciuoti.lt) - [Norge](https://beregne.app)