Free online calculation tools
Free online calculators — percentage, BMI, loan, interest and calorie calculators. Fast, accurate and easy to use calculation tools.
gimmecalc.xyz is a free online calculator portal. Find percentage, BMI, loan, interest, and calorie calculators here. All tools work directly in your browser — no downloads or registration needed.
45 calculators
Fun
Age Calculator
Free online age calculator. Find your exact age in years, months and days, days until your next birthday, and total days lived from your date of birth.
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.
Pet Age Calculator
Free pet age calculator. Convert your dog or cat's age to human years using breed-size adjusted formulas recommended by veterinarians.
Love Calculator
Free online love calculator. Find out your love compatibility percentage based on two names — a fun entertainment calculator to share with friends.
Zodiac Compatibility Calculator
Free zodiac compatibility calculator. Find out how well your zodiac sign matches with your partner's sign based on element astrology.
Converters
Angle converter
Convert angle units: degrees, radians, gradians, arcminutes, arcseconds and turns. Fast and accurate angle unit conversion online.
Area converter
Convert area units: square meters, hectares, acres, square feet, square yards and more. Fast and accurate area unit conversion online.
Data storage converter
Convert data storage units: bytes, kilobytes, megabytes, gigabytes and terabytes. Fast and accurate data storage unit conversion online.
Data transfer rate converter
Convert data transfer rate units: bps, Kbps, Mbps, Gbps and Tbps. Fast and accurate internet speed unit conversion online.
Energy converter
Convert energy units: joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours and BTU. Fast and accurate energy unit conversion online.
Force converter
Convert force units: newtons, kilonewtons, pound-force, dynes and kilogram-force. Fast and accurate force unit conversion online.
Frequency converter
Convert frequency units: hertz, kilohertz, megahertz, gigahertz and RPM. Fast and accurate frequency unit conversion online.
Length converter
Convert length units: meters, centimeters, inches, feet, yards, kilometers and miles. Fast and accurate length unit conversion online.
Number base converter
Convert numbers between binary, octal, decimal, hexadecimal, Base32 and Base64 systems. Fast and accurate number base conversion tool online.
Power converter
Convert power units: watts, kilowatts, horsepower, BTU/h and more. Fast and accurate power unit conversion for cars, appliances and HVAC.
Pressure converter
Convert pressure units: pascals, hectopascals, kilopascals, bars, atmospheres, PSI and mmHg. Fast and accurate pressure unit conversion online.
Speed converter
Convert speed units: km/h, mph, m/s, knots and more. Fast and accurate speed conversion for driving, sports, aviation and science.
Temperature converter
Convert temperature units: Celsius, Fahrenheit and Kelvin. Fast and accurate temperature conversion for travel, cooking, science and more.
Time converter
Convert time units: milliseconds, seconds, minutes, hours, days and weeks. Fast and accurate time unit conversion online.
Torque converter
Convert torque units: newton-meters, foot-pounds, kilogram-force meters, inch-pounds and dyne-centimeters. Accurate torque conversion online.
Volume converter
Convert volume units: liters, milliliters, gallons, pints, cups and cubic meters. Fast and accurate volume unit conversion online.
Weight converter
Convert weight units: kilograms, grams, pounds, ounces, tons and milligrams. Fast and accurate weight and mass unit conversion online.
Health
Blood alcohol content (BAC) calculator
Calculate your blood alcohol content in promille based on weight, sex, drinks consumed and time elapsed. Check if you are under the driving limit.
BMI calculator
Calculate your body mass index (BMI) based on height and weight. Find out if your weight is healthy according to WHO categories — free online BMI 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.
Ovulation calculator
Calculate your ovulation date, fertile window and next period date based on your last menstrual period and cycle length.
Pregnancy due date calculator
Calculate your estimated due date based on your last menstrual period. Pregnancy weeks, trimesters and days remaining.
Daily water intake calculator
Calculate how much water you should drink per day based on your weight, physical activity level and climate. Free daily water intake calculator.
Math
Circle Area Calculator
Calculate the area, circumference and diameter of a circle from its radius or diameter. Free online circle area calculator.
Date Calculator — Days Between Dates
Free date calculator — calculate the number of days, weeks, months and years between two dates. Quick and easy date difference calculation.
Fraction calculator
Add, subtract, multiply and divide fractions with step-by-step solutions. Simplify fractions and convert mixed numbers — free online fraction 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.
Percentage calculator
Calculate percentages quickly and accurately. Find what percentage a number is, percentage change, increase or decrease with this free tool.
Mean, Median, Mode Calculator
Calculate the mean, median, and mode of a set of numbers. Free statistics calculator with sum, range, and other descriptive statistics.
Triangle calculator
Triangle calculator – calculate area, perimeter, and angles. Uses Heron's formula, law of cosines, law of sines, and base-height method.
Word & Character Counter
Count words, characters, sentences and paragraphs in your text instantly. Free word counter tool with reading time estimation for writers.
Finance
Compound growth calculator
Calculate compound growth with periodic contributions. See how your investments or savings grow over time with the power of compounding.
Discount calculator
Calculate the final price after a percentage discount, how much you save, and the price per unit. Free online discount calculator.
Interest calculator
Calculate simple and compound interest on your savings or investments. See how your money grows over time with our free interest calculator.
Loan calculator
Calculate your monthly loan payment, total interest and full repayment amount. View the complete amortization schedule and plan your budget.
Tip calculator
Calculate the tip amount, total bill, and split the cost between multiple people. Free online tip calculator for restaurants and services.
Sports
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. Free online tool.
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.
Ski Size Calculator
Calculate the recommended ski length based on your height, weight, skiing ability and ski type. Free online ski size 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.
Our calculators are organized into categories so you can quickly find the tool you need — from financial calculations to health metrics.