# 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. ## 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](https://gimmecalc.com/age-calculator): Calculate your exact age in years, months, and days from any date of birth. - [Angle converter](https://gimmecalc.com/angle-converter): Convert angle units: degrees, radians, gradians, arcminutes, arcseconds and turns. - [Area converter](https://gimmecalc.com/area-converter): Convert between square meters, hectares, acres, square feet and more. - [BAC calculator – Blood alcohol content](https://gimmecalc.com/bac-calculator): Estimate your blood alcohol content (BAC) from the number of drinks, body weight, sex, and hours elapsed. - [BMI calculator](https://gimmecalc.com/bmi-calculator): Calculate your BMI from height and weight. - [BMR Calculator – Basal Metabolic Rate](https://gimmecalc.com/bmr-calculator): Calculate your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor formula. - [Calorie calculator](https://gimmecalc.com/calorie-calculator): Calculate your daily calorie needs and basal metabolic rate (BMR) based on age, weight, height and activity level. - [Calories Burned by Activity](https://gimmecalc.com/calories-burned-by-activity): Calculate calories burned by activity, weight, and duration. - [Circle Area Calculator](https://gimmecalc.com/circle-area): Calculate the area, circumference and diameter of a circle from its radius or diameter. - [Color Converter](https://gimmecalc.com/color-converter): Convert colors between RGB, HEX, HSL and CMYK formats instantly. - [Compound growth calculator](https://gimmecalc.com/compound-growth-calculator): Calculate compound growth with periodic contributions. - [Cooking Unit Converter](https://gimmecalc.com/cooking-unit-converter): Convert cooking measurements instantly: teaspoons, tablespoons, cups, fluid ounces, milliliters, and liters with this... - [Cylinder Volume & Surface Area Calculator](https://gimmecalc.com/cylinder-calculator): Calculate the volume, total surface area, lateral surface area and base area of a cylinder by entering its radius and... - [Daily Water Intake Calculator](https://gimmecalc.com/water-intake-calculator): Calculate how much water you should drink per day based on your weight, activity level and climate. - [Data storage converter](https://gimmecalc.com/data-storage-converter): Convert data storage units: bytes, kilobytes, megabytes, gigabytes and terabytes. - [Data transfer rate converter](https://gimmecalc.com/data-transfer-rate-converter): Convert data transfer rate units: bps, Kbps, Mbps, Gbps and Tbps. - [Date Calculator — Days Between Dates](https://gimmecalc.com/date-calculator): Calculate the number of days, weeks, months and years between two dates. - [Debt Payoff Calculator](https://gimmecalc.com/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. - [Discount calculator](https://gimmecalc.com/discount-calculator): Calculate the final price after a percentage discount, how much you save, and the price per unit. - [Energy converter](https://gimmecalc.com/energy-converter): Convert energy units: joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours and BTU. - [FIRE Calculator — Financial Independence](https://gimmecalc.com/fire-calculator): Calculate your FIRE number and years to financial independence. - [Force converter](https://gimmecalc.com/force-converter): Convert force units: newtons, kilonewtons, pound-force, dynes and kilogram-force. - [Fraction calculator](https://gimmecalc.com/fraction-calculator): Add, subtract, multiply and divide fractions with step-by-step solutions. - [Frequency converter](https://gimmecalc.com/frequency-converter): Convert frequency units: hertz, kilohertz, megahertz, gigahertz and RPM. - [Generation calculator](https://gimmecalc.com/generation-calculator): Find out which generation you belong to based on your birth year. - [GPA Calculator](https://gimmecalc.com/gpa-calculator): Calculate your semester or cumulative GPA on a 4.0 scale with letter grades and credit hours to track your academic p... - [Ideal Weight Calculator by Height](https://gimmecalc.com/ideal-weight-calculator): How much should I weigh? - [Interest Calculator](https://gimmecalc.com/interest-calculator): Calculate simple and compound interest on your savings or investments. - [Length converter](https://gimmecalc.com/length-converter): Convert length units: meters, centimeters, inches, feet, yards, kilometers and miles. - [Loan Payment Calculator](https://gimmecalc.com/loan-calculator): Calculate monthly payments, total interest, and repayment schedule for personal loans, car loans, and consumer credit. - [Loose-Fill Insulation Calculator](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](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](https://gimmecalc.com/max-heart-rate-calculator): Calculate your maximum heart rate by age with the 220−age or Tanaka formula and see all five heart rate training zone... - [Mean, Median, Mode Calculator](https://gimmecalc.com/mean-median-mode-calculator): Calculate mean, median, and mode for any set of numbers. - [Mortgage Calculator](https://gimmecalc.com/mortgage-amortization-schedule): Calculate your monthly mortgage payment and full amortization schedule. - [Number base converter](https://gimmecalc.com/number-base-converter): Convert numbers between binary, octal, decimal, hexadecimal, Base32 and Base64 systems. - [One Rep Max (1RM) Calculator](https://gimmecalc.com/one-rep-max-calculator): Calculate your one rep max (1RM) based on the weight lifted and number of repetitions using 5 proven strength trainin... - [Ovulation Calculator](https://gimmecalc.com/ovulation-calculator): Calculate your ovulation date, fertile window, and next period from your last menstrual period and cycle length — so ... - [Paint calculator](https://gimmecalc.com/paint-calculator): Calculate how much paint you need for a room. - [Password generator](https://gimmecalc.com/password-generator): Generate strong, random passwords with custom length and character options. - [Percentage Calculator](https://gimmecalc.com/percentage-calculator): Calculate percentages quickly and accurately. - [Pet Age Calculator](https://gimmecalc.com/pet-age-calculator): Convert your dog or cat's age to equivalent human years using veterinarian-recommended formulas adjusted for breed si... - [Power converter](https://gimmecalc.com/power-converter): Convert power units: watts, kilowatts, horsepower, BTU/h and more. - [Pregnancy due date calculator](https://gimmecalc.com/pregnancy-calculator): Calculate your estimated due date based on your last menstrual period. - [Pregnancy weight gain calculator](https://gimmecalc.com/pregnancy-weight-gain-calculator): Track whether your pregnancy weight gain is on target. - [Pressure converter](https://gimmecalc.com/pressure-converter): Convert pressure units: pascals, hectopascals, kilopascals, bars, atmospheres, PSI and mmHg. - [Profit Margin Calculator](https://gimmecalc.com/profit-margin-calculator): Calculate profit margin, markup, and selling price from cost. - [Pythagorean Theorem Calculator](https://gimmecalc.com/pythagorean-theorem-calculator): Calculate the missing side of a right triangle using the Pythagorean theorem. - [Race Time Predictor](https://gimmecalc.com/race-time-predictor): Predict your finish time for any race distance based on a previous result. - [Random Number Generator](https://gimmecalc.com/random-number-generator): Generate random integers instantly. - [Recipe Scaler](https://gimmecalc.com/recipe-scaler): Scale any recipe up or down instantly. - [Roman Numeral Converter](https://gimmecalc.com/roman-numerals): Convert numbers between Roman and Arabic numerals instantly. - [Running pace calculator](https://gimmecalc.com/running-pace-calculator): Calculate your running pace, finish time, or distance. - [Savings Goal Calculator](https://gimmecalc.com/savings-goal-calculator): Calculate how long it takes to reach your savings goal or find the monthly contribution needed to achieve your target... - [Scientific Calculator](https://gimmecalc.com/scientific-calculator): Solve trigonometry, logarithms, powers, and factorials with a scientific calculator supporting sin, cos, tan, log, ln... - [Shoe size converter – EU, US, UK & CM](https://gimmecalc.com/shoe-size-converter): Convert shoe sizes between EU, US Men, US Women, UK, and CM. - [Ski Binding DIN Calculator](https://gimmecalc.com/ski-binding-din-calculator): Calculate your ski binding DIN release value by weight, height, age, and skier type. - [Ski Size Calculator](https://gimmecalc.com/ski-size-calculator): Calculate the recommended ski length based on your height, weight, skiing ability and ski type. - [Sleep Cycle Calculator](https://gimmecalc.com/sleep-cycle-calculator): Find the best bedtime based on your wake-up time. - [Speed converter](https://gimmecalc.com/speed-converter): Convert speed units: km/h, mph, m/s, knots and more. - [Sphere Volume and Surface Area Calculator](https://gimmecalc.com/sphere-calculator): Calculate the volume and surface area of any sphere by entering its radius. - [TDEE Calculator](https://gimmecalc.com/tdee-calculator): Calculate your TDEE — total daily energy expenditure based on weight, height, age, sex, and activity level. - [Temperature converter](https://gimmecalc.com/temperature-converter): Convert temperature units: Celsius, Fahrenheit and Kelvin. - [Tile Calculator](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](https://gimmecalc.com/time-converter): Convert time units: milliseconds, seconds, minutes, hours, days and weeks. - [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... - [Torque converter](https://gimmecalc.com/torque-converter): Convert torque units: newton-meters, foot-pounds, kilogram-force meters, inch-pounds and dyne-centimeters. - [Triangle calculator](https://gimmecalc.com/triangle-calculator): Triangle calculator – calculate area, perimeter, and angles. - [UUID Generator](https://gimmecalc.com/uuid-generator): Generate random UUID v4 identifiers instantly. - [Volume converter](https://gimmecalc.com/volume-converter): Convert volume units: liters, milliliters, gallons, pints, cups and cubic meters. - [Weight converter](https://gimmecalc.com/weight-converter): Convert weight units: kilograms, grams, pounds, ounces, tons and milligrams. - [Word & Character Counter](https://gimmecalc.com/word-and-character-counter): Count words, characters, sentences and paragraphs in your text instantly. - [Z-Score Calculator](https://gimmecalc.com/z-score-calculator): Calculate the Z-score from a value, mean, and standard deviation, or convert a Z-score to a cumulative probability an... - [Zodiac Compatibility Calculator](https://gimmecalc.com/zodiac-compatibility): Find out how well your zodiac sign matches another based on element 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)