Calculators

Instantly calculate loan installments, federal income tax, unit conversions, and more.

Percentage Calculator

Calculate a percentage of a number, or a percentage increase/decrease.

Work out your average grade across courses or exams, weighted by credits or percentages, on a 100-point, 10-point, or 4.0 scale.

Find out your body mass index based on your height and weight.

Calculate your exact age in years/months/days from your birth date.

Calculate the number of days, weeks, and months between two dates.

Calculate your monthly installment based on loan amount, interest rate, and term.

Convert between length, weight, and temperature units instantly.

Estimate your US federal income tax and whether you're due a refund, right in your browser.

Convert between currencies using live exchange rates, right in your browser.

Calculate your monthly mortgage payment, total interest, and yearly amortization schedule.

Calculate the tip and split the bill between any number of people.

Solve for the missing value in a proportion, either direct or inverse, and see the formula worked out.

Estimate your due date from your last period, conception date, or IVF transfer, and see how many weeks pregnant you are.

See how savings or investments grow with compound interest and regular monthly contributions, year by year.

Add VAT to a net price or remove it from a gross price at 20%, 5% or any rate, and see the net, VAT and gross amounts at once.

Estimate your take-home pay after federal, state, Social Security, and Medicare taxes.

Convert an hourly wage to annual, monthly, biweekly, weekly, and daily pay — or turn a yearly salary back into an hourly rate.