# gimmecalc.com > Free online calculators — percentage, BMI, loan, tip, and other useful calculation tools. gimmecalc.com is a free calculator portal with 112 interactive tools. Each calculator runs in-browser with instant results — no signup required. ## Categories - [Construction](https://gimmecalc.com/construction-calculators) - [Finance](https://gimmecalc.com/finance-calculators): Loans, interest, compound growth, mortgages, salary, tips - [Health](https://gimmecalc.com/health-calculators): BMI, calories, BMR, TDEE, pregnancy, water intake - [Math](https://gimmecalc.com/math-calculators): Percentages, averages, statistics, geometry, number tools - [Sports](https://gimmecalc.com/sports-calculators): Running pace, race predictions, step counting, training zones - [Fun](https://gimmecalc.com/fun-calculators): Random generators, name pickers, dice, love compatibility - [Utility](https://gimmecalc.com/utility-tools): Time, dates, age, fuel cost, password generation - [Converters](https://gimmecalc.com/converters): Length, weight, temperature, area, volume, speed, data ## Calculators - [Age Calculator — Exact Age in Years, Months & Days](https://gimmecalc.com/age-calculator): Calculate your exact age in years, months, and days from any date of birth. - [Angle Converter — Degrees, Radians & Gradians](https://gimmecalc.com/angle-converter): Convert angle units between degrees, radians, gradians, arcminutes, arcseconds, and turns with instant results. - [Animal Speed Comparison — Which Animals Can You Outrun?](https://gimmecalc.com/animal-speed-comparison): Enter your running speed and instantly see which animals you can outrun. - [Area Converter — Square Meters, Hectares, Acres & More](https://gimmecalc.com/area-converter): Convert area units between square meters, hectares, acres, square feet, and square yards instantly. - [BAC Calculator — Estimate Your Blood Alcohol Level](https://gimmecalc.com/bac-calculator): Estimate your blood alcohol content (BAC) from the number of drinks, body weight, sex, and hours elapsed. - [Billionaire Timer — How Long to Earn a Billion?](https://gimmecalc.com/billionaire-timer): Enter your salary and see how many years, days, and working lifetimes it would take to earn a billion dollars. - [BMI Calculator — Check Your Body Mass Index Instantly](https://gimmecalc.com/bmi-calculator): Calculate your BMI from height and weight. - [BMR Calculator — Basal Metabolic Rate by Mifflin-St Jeor](https://gimmecalc.com/bmr-calculator): Calculate your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor formula. - [Body Fat Percentage Calculator — Navy & Skinfold Methods](https://gimmecalc.com/body-fat-calculator): Estimate your body fat percentage using the U.S. - [Calorie Calculator — Daily Calorie Needs & BMR](https://gimmecalc.com/calorie-calculator): Calculate your daily calorie needs and basal metabolic rate (BMR) using the Mifflin-St Jeor formula. - [Calories Burned by Activity — MET-Based Calculator](https://gimmecalc.com/calories-burned-by-activity): Calculate calories burned by activity, body weight, and duration using MET values. - [Circle Area Calculator — Radius, Diameter & Circumference](https://gimmecalc.com/circle-area): Calculate the area, circumference, and diameter of a circle from its radius or diameter. - [Color Converter — RGB, HEX, HSL & CMYK Formats](https://gimmecalc.com/color-converter): Convert colors between RGB, HEX, HSL, and CMYK formats instantly with live preview. - [Compound Growth Calculator — Investment & Savings Growth](https://gimmecalc.com/compound-growth-calculator): Calculate compound growth with periodic contributions and see how your investments or savings grow over time. - [Cooking Unit Converter — Cups, Tablespoons & Milliliters](https://gimmecalc.com/cooking-unit-converter): Convert cooking measurements between teaspoons, tablespoons, cups, fluid ounces, milliliters, and liters instantly. - [Cylinder Calculator — Volume & Surface Area Solver](https://gimmecalc.com/cylinder-calculator): Calculate cylinder volume, total surface area, lateral surface area, and base area from radius and height. - [Data Storage Converter — Bytes, MB, GB & Terabytes](https://gimmecalc.com/data-storage-converter): Convert data storage units between bytes, kilobytes, megabytes, gigabytes, and terabytes using the binary system. - [Data Transfer Rate Converter — Mbps, Gbps & More](https://gimmecalc.com/data-transfer-rate-converter): Convert data transfer rate units between bps, Kbps, Mbps, Gbps, and Tbps instantly. - [Date Calculator — Days, Weeks & Months Between Dates](https://gimmecalc.com/date-calculator): Calculate the exact number of days, weeks, months, and years between any two dates. - [Debt Payoff Calculator — Time to Pay Off Your Balance](https://gimmecalc.com/debt-payoff-calculator): Calculate how long it takes to pay off a debt or find the exact monthly payment needed to clear your balance by a tar... - [Discount Calculator — Final Price, Savings & Per Unit](https://gimmecalc.com/discount-calculator): Calculate the final price after a percentage discount, how much you save, and the price per unit. - [Electricity Cost Calculator — Estimate Your Bill](https://gimmecalc.com/electricity-cost-calculator): Calculate your electricity bill from kWh consumption and price per kWh. - [Energy Converter — Joules, Calories, kWh & BTU](https://gimmecalc.com/energy-converter): Convert energy units between joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, and BTU with ins... - [FIRE Calculator — Financial Independence, Retire Early](https://gimmecalc.com/fire-calculator): Calculate your FIRE number, years to financial independence, and projected retirement date. - [Force Converter — Newtons, Pound-Force & Dynes](https://gimmecalc.com/force-converter): Convert force units between newtons, kilonewtons, pound-force, dynes, and kilogram-force instantly. - [Fraction Calculator — Add, Subtract, Multiply & Divide](https://gimmecalc.com/fraction-calculator): Add, subtract, multiply, and divide fractions with step-by-step solutions. - [Frequency Converter — Hertz, MHz, GHz & RPM](https://gimmecalc.com/frequency-converter): Convert frequency units between hertz, kilohertz, megahertz, gigahertz, and RPM instantly. - [Generation Calculator — Find Your Generation by Birth Year](https://gimmecalc.com/generation-calculator): Enter your birth year to discover which generation you belong to. - [Germany Freelancer Tax Calculator — Einkommensteuer 2026](https://gimmecalc.com/germany-freelancer-tax-calculator): Estimate your German freelancer tax for 2026 — income tax, solidarity surcharge, trade tax, and church tax for both F... - [Ghana PAYE Calculator — GRA Tax Rates & SSNIT 2026](https://gimmecalc.com/ghana-paye-calculator): Calculate your net salary in Ghana after PAYE income tax and SSNIT deductions using the latest 2026 GRA progressive t... - [GPA Calculator — Semester & Cumulative Grade Average](https://gimmecalc.com/gpa-calculator): Calculate your semester or cumulative GPA on a 4.0 scale. - [Hangover Recovery Calculator — Severity & Sobriety Time](https://gimmecalc.com/hangover-recovery-calculator): Estimate your hangover severity, time until sober, and hydration needs based on drinks consumed, body weight, and rec... - [Ideal Weight Calculator — By Height Using 4 Formulas](https://gimmecalc.com/ideal-weight-calculator): How much should I weigh? - [Inflation Calculator — Historical Value & CPI Adjustments](https://gimmecalc.com/inflation-calculator): Find out what money from any year is worth today. - [Interest Calculator — Simple & Compound Interest](https://gimmecalc.com/interest-calculator): Calculate simple and compound interest on your savings or investments. - [Japan Pension Calculator — Kosei Nenkin & Kokumin Nenkin](https://gimmecalc.com/japan-pension-calculator): Estimate your Japanese pension benefits for Kokumin Nenkin (national) and Kosei Nenkin (employees') based on contribu... - [Japan Salary Calculator — Tax, Social Insurance & Net Pay](https://gimmecalc.com/japan-salary-calculator): Calculate your Japanese take-home pay from gross salary. - [Length Converter — Meters, Feet, Inches & Miles](https://gimmecalc.com/length-converter): Convert length and distance units between meters, centimeters, inches, feet, yards, kilometers, and miles instantly. - [Life Progress Bar Calculator — How Much Life Is Left?](https://gimmecalc.com/life-progress-bar): Enter your birth date, country, and sex to see what percentage of your expected life you've used. - [Loan Payment Calculator — Monthly Payments & Interest](https://gimmecalc.com/loan-calculator): Calculate monthly payments, total interest, and full repayment schedule for personal loans, car loans, and consumer c... - [Logarithm Calculator — Log Base N, Ln, Log₁₀ & Log₂](https://gimmecalc.com/logarithm-calculator): Calculate the logarithm of any positive number with any base. - [Loose-Fill Insulation Calculator — Bags & R-Value](https://gimmecalc.com/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... - [Love Calculator — Name Compatibility Percentage](https://gimmecalc.com/love-calculator): Find out your love compatibility percentage based on two names — a fun entertainment calculator using the classic LOV... - [Maximum Heart Rate Calculator — Training Zones by Age](https://gimmecalc.com/max-heart-rate-calculator): Calculate your maximum heart rate by age using the 220-age, Tanaka, and HUNT formulas. - [Mean, Median, Mode Calculator — Descriptive Statistics](https://gimmecalc.com/mean-median-mode-calculator): Calculate mean, median, and mode for any set of numbers. - [Meeting Cost Calculator — Total Cost Per Meeting](https://gimmecalc.com/meeting-cost-calculator): Calculate the true cost of any meeting based on attendees, hourly rates, and duration. - [Mortgage Calculator — Payments & Amortization Schedule](https://gimmecalc.com/mortgage-amortization-schedule): Calculate your monthly mortgage payment, total interest, and full amortization schedule. - [Netherlands 30% Ruling Calculator — Expat Tax Savings 2026](https://gimmecalc.com/netherlands-30-percent-ruling-calculator): Estimate your annual tax saving from the Dutch 30% ruling. - [Nigeria Freelancer Tax Calculator — 2026 PIT, VAT & WHT](https://gimmecalc.com/nigeria-freelancer-tax-calculator): Calculate your Nigerian freelancer tax for 2026 with progressive PIT bands, VAT obligations, withholding tax credits,... - [Nigeria PAYE Calculator — 2026 Salary After Tax & Deductions](https://gimmecalc.com/nigeria-paye-calculator): Calculate your Nigerian take-home pay for 2026 with updated PAYE tax bands, pension, NHF, and rent relief under the N... - [Number Base Converter — Binary, Hex, Decimal & More](https://gimmecalc.com/number-base-converter): Convert numbers between binary, octal, decimal, hexadecimal, Base32, and Base64 systems instantly. - [One Rep Max (1RM) Calculator — Estimate Your Max Lift](https://gimmecalc.com/one-rep-max-calculator): Calculate your one rep max (1RM) based on weight lifted and reps using five proven formulas: Epley, Brzycki, Lander, ... - [Ovulation Calculator — Fertile Window & Period Tracker](https://gimmecalc.com/ovulation-calculator): Calculate your ovulation date, fertile window, and next period based on your last menstrual period and cycle length. - [Paint Calculator — How Much Paint Do You Need?](https://gimmecalc.com/paint-calculator): Calculate how much paint you need for any room. - [Password Generator — Create Strong, Secure Passwords](https://gimmecalc.com/password-generator): Generate strong, random passwords with custom length, character types, and a built-in strength indicator. - [Percentage Calculator — Find, Change & Compare Percents](https://gimmecalc.com/percentage-calculator): Calculate percentages quickly and accurately. - [Pet Age Calculator — Dog & Cat Years to Human Years](https://gimmecalc.com/pet-age-calculator): Convert your dog or cat's age to human years using veterinarian-recommended formulas. - [Planetary Age Calculator — Your Age on Every Planet](https://gimmecalc.com/planetary-age-calculator): Find out how old you would be on Mercury, Venus, Mars, Jupiter, Saturn, Uranus, and Neptune. - [Power Converter — Watts, Kilowatts & Horsepower](https://gimmecalc.com/power-converter): Convert power units between watts, kilowatts, horsepower, and BTU/h with instant results. - [Pregnancy Due Date Calculator — Weeks & Trimester Tracker](https://gimmecalc.com/pregnancy-calculator): Calculate your estimated due date using Naegele's rule based on your last menstrual period. - [Pregnancy Weight Gain Calculator — IOM Guidelines](https://gimmecalc.com/pregnancy-weight-gain-calculator): Track whether your pregnancy weight gain is on target week by week. - [Pressure Converter — PSI, Bar, Atmospheres & Pascal](https://gimmecalc.com/pressure-converter): Convert pressure units between pascals, bars, atmospheres, PSI, and mmHg instantly. - [Probability Calculator — Single, Joint & Binomial](https://gimmecalc.com/probability-calculator): Calculate probability for single events, two independent events, and binomial distributions with step-by-step solutions. - [Profit Margin Calculator — Margin, Markup & Pricing](https://gimmecalc.com/profit-margin-calculator): Calculate profit margin, markup percentage, and selling price from cost. - [Pythagorean Theorem Calculator — Find Missing Sides](https://gimmecalc.com/pythagorean-theorem-calculator): Calculate the missing side of a right triangle using the Pythagorean theorem (a² + b² = c²). - [Quadratic Equation Calculator — Roots, Discriminant & Vertex](https://gimmecalc.com/quadratic-equation-calculator): Solve any quadratic equation ax² + bx + c = 0 using the quadratic formula. - [Race Time Predictor — Estimate Your Finish Time](https://gimmecalc.com/race-time-predictor): Predict your finish time for any race distance based on a previous result. - [Random Number Generator — Pick Numbers From Any Range](https://gimmecalc.com/random-number-generator): Generate random integers instantly within any range. - [Real Hourly Wage Calculator — What You Actually Earn](https://gimmecalc.com/real-hourly-wage-calculator): Find your true hourly wage after commute, unpaid overtime, prep time, and work-related costs. - [Recipe Scaler — Adjust Ingredient Quantities Instantly](https://gimmecalc.com/recipe-scaler): Scale any recipe up or down by changing the number of servings. - [ROI Calculator — Return on Investment Percentage](https://gimmecalc.com/roi-calculator): Calculate return on investment by entering your initial investment amount and net profit. - [Roman Numeral Converter — Arabic to Roman & Back](https://gimmecalc.com/roman-numerals): Convert numbers between Roman and Arabic numerals instantly. - [RRSP Tax Refund Calculator — Canada 2026 Estimate](https://gimmecalc.com/canada-rrsp-calculator): Estimate your Canadian RRSP tax refund by income, province, and contribution amount using 2026 federal and provincial... - [Running Pace Calculator — Pace, Time & Distance](https://gimmecalc.com/running-pace-calculator): Calculate your running pace, finish time, or distance by entering any two values. - [Salary in Big Macs Calculator — Purchasing Power Fun](https://gimmecalc.com/salary-in-big-macs-calculator): Convert your annual salary into Big Macs, iPhones, and Tesla Model 3s. - [Salary to Hourly Calculator — Annual to Hourly Rate](https://gimmecalc.com/salary-to-hourly-calculator): Convert annual salary to hourly rate or hourly to annual. - [Saudi End of Service Calculator — ESB Gratuity 2026](https://gimmecalc.com/saudi-end-of-service-calculator): Calculate your Saudi end-of-service benefits under Articles 84 and 85 of the Labor Law. - [Savings Goal Calculator — Time & Monthly Amount Planner](https://gimmecalc.com/savings-goal-calculator): Calculate how long it takes to reach your savings goal or find the exact monthly contribution needed. - [Scientific Calculator — Trig, Logs, Powers & Constants](https://gimmecalc.com/scientific-calculator): Solve trigonometry, logarithms, powers, and factorials with a scientific calculator supporting sin, cos, tan, log, ln... - [Scientific Notation Calculator — Convert To Standard Form](https://gimmecalc.com/scientific-notation-calculator): Convert any number between scientific notation, E notation, engineering notation and standard decimal form, and see i... - [Shoe Size Converter — EU, US Men, US Women, UK & CM](https://gimmecalc.com/shoe-size-converter): Convert shoe sizes between EU, US Men, US Women, UK, and CM (Mondopoint) scales. - [Significant Figures Calculator — Count & Round Sig Figs](https://gimmecalc.com/significant-figures-calculator): Count the significant figures in any number and round to a chosen number of sig figs. - [Singapore Salary Calculator — CPF & Take-Home Pay](https://gimmecalc.com/singapore-salary-calculator): Calculate your Singapore take-home pay from gross salary. - [Ski Binding DIN Calculator — ISO 11088 Release Value](https://gimmecalc.com/ski-binding-din-calculator): Calculate your ski binding DIN release value based on weight, height, age, and skier type using the ISO 11088 standard. - [Ski Size Calculator — Find Your Ideal Ski Length](https://gimmecalc.com/ski-size-calculator): Calculate the recommended ski length based on your height, weight, skiing ability, and ski type. - [Sleep Cycle Calculator — Find Your Ideal Bedtime](https://gimmecalc.com/sleep-cycle-calculator): Find the best bedtime based on your wake-up time by aligning sleep with 90-minute cycles. - [Slope Calculator — Rise Over Run & Line Equation](https://gimmecalc.com/slope-calculator): Calculate the slope between two coordinate points, find the y-intercept, and get the full line equation in slope-inte... - [Speed Converter — km/h, mph, m/s, Knots & More](https://gimmecalc.com/speed-converter): Convert between speed units instantly — km/h, mph, m/s, knots, and more. - [Sphere Calculator — Volume and Surface Area by Radius](https://gimmecalc.com/sphere-calculator): Calculate the volume, surface area, and circumference of any sphere by entering its radius. - [Square Footage Calculator — Room Area in Sq Ft & Sq M](https://gimmecalc.com/square-footage-calculator): Calculate room or space area in square feet and square meters by entering length and width. - [Standard Deviation Calculator — Variance, Mean & Spread](https://gimmecalc.com/standard-deviation-calculator): Calculate population and sample standard deviation, variance, and mean from any dataset. - [Summers Left Calculator — How Many Summers Remain?](https://gimmecalc.com/summers-left-calculator): Enter your age and life expectancy to see how many summers you have left. - [Superannuation Calculator — Australia Super Balance Projection](https://gimmecalc.com/australian-superannuation-calculator): Project your superannuation balance at retirement age 67 using Australia's 12% Super Guarantee rate, voluntary contri... - [TDEE Calculator — Total Daily Energy Expenditure](https://gimmecalc.com/tdee-calculator): Calculate your TDEE — total daily energy expenditure based on weight, height, age, sex, and activity level. - [Temperature Converter — Celsius, Fahrenheit & Kelvin](https://gimmecalc.com/temperature-converter): Convert temperatures between Celsius, Fahrenheit, and Kelvin scales instantly. - [Test Grade Calculator — Score Percentage & Letter Grade](https://gimmecalc.com/test-grade-calculator): Calculate your test score percentage and letter grade instantly. - [Tile Calculator — How Many Tiles Do You Need?](https://gimmecalc.com/tile-calculator): Calculate how many tiles you need for any floor or wall. - [Time Calculator — Add & Subtract Hours & Minutes](https://gimmecalc.com/time-calculator): Add or subtract hours, minutes and seconds instantly. - [Time Converter — Seconds, Minutes, Hours, Days & Weeks](https://gimmecalc.com/time-converter): Convert time units between milliseconds, seconds, minutes, hours, days, and weeks with instant precision. - [Tip Calculator — Split Bills & Calculate Tips](https://gimmecalc.com/tip-calculator): Calculate tips and split restaurant bills instantly — enter the bill amount, choose a tip percentage, and see the tot... - [Toilet Salary Calculator — Paid to Poop at Work](https://gimmecalc.com/toilet-salary-calculator): Find out how much money you earn while sitting on the toilet at work. - [Torque Converter — Newton-Meters & Foot-Pounds](https://gimmecalc.com/torque-converter): Convert torque units between newton-meters, foot-pounds, kilogram-force meters, inch-pounds, and dyne-centimeters. - [Triangle Calculator — Area, Perimeter & Angles Solver](https://gimmecalc.com/triangle-calculator): Calculate triangle area, perimeter, and angles from sides or angles. - [UAE Gratuity Calculator — End-of-Service Benefits 2026](https://gimmecalc.com/uae-gratuity-calculator): Calculate your UAE end-of-service gratuity based on basic salary, years of service, and contract type using the lates... - [UAE Salary Calculator — Package Breakdown & Gratuity](https://gimmecalc.com/uae-salary-calculator): Break down your UAE salary into basic pay, allowances, and gratuity accrual. - [UUID Generator — Create Random v4 Identifiers](https://gimmecalc.com/uuid-generator): Generate random UUID v4 identifiers instantly. - [Volume Converter — Liters, Gallons, Cups & Cubic Meters](https://gimmecalc.com/volume-converter): Convert volume units between liters, milliliters, gallons, pints, cups, and cubic meters with precise results. - [Water Intake Calculator — Daily Hydration by Weight](https://gimmecalc.com/water-intake-calculator): Calculate how much water you should drink per day based on your weight, activity level, and climate. - [Weight Converter — Kilograms, Pounds, Ounces & More](https://gimmecalc.com/weight-converter): Convert weight and mass units between kilograms, grams, pounds, ounces, tons, and milligrams with instant results. - [Word & Character Counter — Text Length Analyzer](https://gimmecalc.com/word-and-character-counter): Count words, characters, sentences, and paragraphs in your text instantly. - [Z-Score Calculator — Standard Score & Percentile Finder](https://gimmecalc.com/z-score-calculator): Calculate the Z-score from a value, mean, and standard deviation, or convert a Z-score to cumulative probability and ... - [Zodiac Compatibility Calculator — Sign Match Scores](https://gimmecalc.com/zodiac-compatibility): Check how well your zodiac sign matches another using element-based astrology. ## Optional ### Embedding Every calculator can be embedded on any website: - Pre-fill calculator inputs via query parameters: `https://gimmecalc.com/embed/{calculator-slug}/?param1=value1¶m2=value2` - oEmbed endpoint: `https://gimmecalc.com/oembed?url=https://gimmecalc.com/embed/{calculator-slug}/&format=json` - Embed manifest: https://gimmecalc.com/oembed-manifest.json ### Other languages - [Lietuva](https://skaiciuoti.lt) - [Norge](https://beregne.app)