Every calculator you need,
in one calm place.
Fast, free calculators for money, health, and everyday math. Instant results, no clutter, works on any device.
Finance
Loans, interest, pay and everyday money math.
Work out the monthly payment, total interest and total cost of any loan or mortgage.
Open →See how savings or investments grow over time with compound interest and regular contributions.
Open →Convert an annual salary to an hourly, weekly or monthly rate — and back again.
Open →Calculate the tip and split the bill evenly between any number of people.
Open →See if refinancing saves money and how fast you break even on closing costs.
Open →Project your retirement nest egg from savings, monthly contributions and returns.
Open →Estimate your 401(k) balance at retirement including employer matching and growth.
Open →Find how long it takes to clear credit card debt and the total interest you'll pay.
Open →Compare snowball and avalanche strategies to pay off multiple debts faster.
Open →Calculate return on investment, net profit and annualized ROI for any investment.
Open →Find the monthly deposit needed to reach a savings goal by your target date.
Open →Calculate the maturity value and APY of a certificate of deposit.
Open →Calculate simple interest and the total owed or earned on a principal over time.
Open →Estimate how much house you can afford from income, debts and down payment.
Open →See how inflation changes the buying power of money over a number of years.
Open →Add or remove US sales tax from a price and see the tax amount and total.
Open →Add or remove VAT at any rate to find net price, VAT amount and gross total.
Open →Auto
Car loans, leases and payment math.
Business
Pricing, margins and break-even.
Health
Body metrics and daily energy needs.
Calculate your Body Mass Index in metric or imperial units and see your weight category.
Open →Estimate your daily calorie needs (BMR and TDEE) for maintaining, losing or gaining weight.
Open →Estimate your body fat percentage using the US Navy tape-measurement method.
Open →Calculate the calories your body burns at rest using the Mifflin-St Jeor equation.
Open →Estimate your ideal body weight using the Devine, Robinson, Miller and Hamwi formulas.
Open →Split your daily calories into protein, carb and fat targets for your goal.
Open →Find your most fertile days and next period from your last cycle and length.
Open →Estimate your baby's due date and current pregnancy week from your last period.
Open →Estimate your one-rep max and training percentages from a set's weight and reps.
Open →Estimate how much water you should drink each day based on weight and activity.
Open →Date & Time
Count days, spans and deadlines.
Count the days, weeks and months between two dates — or how long until a future date.
Open →Calculate exact age in years, months and days between a birth date and any date.
Open →Count down the days, weeks and months until any upcoming date or event.
Open →Count working days between two dates, excluding weekends and chosen holidays.
Open →Calculate the hours and minutes between two times, ideal for timesheets and shifts.
Open →Math
Percentages and quick number tools.
Find a percentage of a number, percentage change, and what percent one number is of another.
Open →Calculate your grade point average from course grades and credit hours.
Open →Add, subtract, multiply and divide fractions with simplified results and decimals.
Open →Calculate mean, variance and standard deviation for a data set (sample or population).
Open →Convert numbers to Roman numerals and Roman numerals back to numbers instantly.
Open →Conversions
Units and currencies, converted instantly.
Convert length, weight, temperature and volume between metric and imperial units.
Open →Convert between world currencies with a simple, fast exchange-rate calculator.
Open →Convert fuel economy between US MPG, UK MPG, km/L and liters per 100 km.
Open →Convert cooking volumes between cups, tablespoons, teaspoons, milliliters and ounces.
Open →Home & DIY
Room, paint and material estimates.