Free Calculators
Financial, health, math, date and everyday calculators — plus a complete unit converter suite. Fast, accurate and free, with no sign-up required.
Financial
Loans, mortgages, interest, investing & tax.
Mortgage Calculator
Estimate monthly home-loan payments with principal, interest, taxes, insurance and a full amortization schedule.
Loan Calculator
Calculate the monthly payment, total interest and payoff for any amortized loan.
Auto Loan Calculator
Work out car payments including sales tax, fees, trade-in and down payment.
Compound Interest Calculator
See how savings grow with compound interest and regular contributions over time.
Simple Interest Calculator
Compute simple interest and the final balance from principal, rate and term.
Investment Calculator
Project the future value of an investment with starting amount, contributions and return rate.
Retirement Calculator
Estimate how much you will have saved for retirement and whether you are on track.
Savings Calculator
Find out how long it takes to reach a savings goal, or how much to save each month.
Sales Tax Calculator
Add or remove sales tax from a price and see the tax amount instantly.
Salary Calculator
Convert pay between hourly, weekly, monthly and annual amounts.
Tip Calculator
Calculate the tip and split the bill evenly between any number of people.
Discount Calculator
Find the sale price and amount saved for any percentage discount.
ROI Calculator
Measure return on investment as a percentage and annualized rate.
Inflation Calculator
See how inflation changes the buying power of money over a number of years.
Currency ConverterLive
Convert between world currencies with up-to-date exchange rates.
Zakat CalculatorLive
Calculate Zakat due on cash, gold, silver and other assets.
Fitness & Health
BMI, calories, body fat, pace & more.
BMI Calculator
Calculate Body Mass Index and see your weight category for metric or imperial units.
BMR Calculator
Estimate your Basal Metabolic Rate — the calories your body burns at rest.
Calorie Calculator
Find your daily calorie needs (TDEE) for maintaining, losing or gaining weight.
Body Fat Calculator
Estimate body fat percentage using the U.S. Navy tape measurement method.
Ideal Weight Calculator
Get your ideal body weight range from popular formulas (Robinson, Devine, BMI).
Macro Calculator
Split your daily calories into protein, carbohydrate and fat targets.
Pace Calculator
Calculate running pace, finish time or distance for any workout or race.
Pregnancy Due Date Calculator
Estimate your pregnancy due date and current week from your last period.
Water Intake Calculator
Estimate how much water you should drink each day based on weight and activity.
Math
Percentages, fractions, statistics & scientific.
Scientific Calculator
A full scientific calculator with trig, logs, powers, roots and constants.
Percentage Calculator
Solve every percentage problem: percent of, percent change, and X is what % of Y.
Fraction Calculator
Add, subtract, multiply and divide fractions with simplified results.
Average Calculator
Compute the mean, median, mode, range, sum and count of a set of numbers.
Standard Deviation Calculator
Calculate population & sample standard deviation, variance and mean.
Random Number Generator
Generate random numbers within a range, with or without duplicates.
Ratio Calculator
Simplify ratios and solve for the missing value in a proportion.
GCD & LCM Calculator
Find the greatest common divisor and least common multiple of two or more numbers.
Number Base Converter
Convert numbers between binary, decimal, octal and hexadecimal.
Rounding Calculator
Round numbers to decimal places, significant figures or the nearest multiple.
Date & Time
Age, date differences, durations & hours.
Age CalculatorLive
Find your exact age in years, months and days plus a birthday countdown.
Date Calculator
Find the days between two dates, or add/subtract days, weeks and months from a date.
Time Calculator
Add or subtract hours, minutes and seconds, or find the duration between two times.
Hours Calculator
Calculate hours worked between a start and end time, minus breaks.
Everyday
Tips, fuel, grades and other handy tools.