The full toolbox

All calculators

Every tool is free, works instantly in your browser, and never stores your data. New calculators are added regularly.

Finance

Loans, savings, investing and everyday money math.

Compound Interest Calculator See how your savings or investments grow over time with compound interest. Add regular contributions and visualise year-by-year growth. Loan & Mortgage Payment Calculator Work out the monthly payment on any loan or mortgage, see the total interest you'll pay, and explore how extra payments help you finish sooner. Savings Goal Calculator Find out how much to save each month to reach a money goal — or how long it will take if you already know your monthly amount. Mortgage Affordability Calculator Estimate the maximum home price and mortgage you can afford based on your income, debts, and down payment. Uses the standard 28/36 qualifying ratios. ROI Calculator Calculate the return on investment for any project, stock, or business venture. Get simple ROI, annualized ROI, and see whether a gain or loss is worth it.

Math

Percentages, ratios and quick math helpers.

Percentage Calculator Quickly work out a percentage of a number, what percent one number is of another, and the percentage increase or decrease between two values.

Health

Body, fitness and wellbeing calculators.

BMI Calculator Calculate your Body Mass Index in metric or imperial units. See your BMI category and where you fall on the standard weight classification scale.

Everyday

Handy tools for day-to-day life.

Tip Calculator Calculate how much to tip on any restaurant bill. Choose your tip percentage, split it between any number of people, and see exactly what each person pays. Age Calculator Find your exact age in years, months, and days from any birth date. See your next birthday countdown and discover what day of the week you were born. Unit Converter Convert between units of length, weight, temperature, volume, area, and speed instantly. Metric and imperial units — just type a value and get the answer. Currency Converter Convert between 160+ world currencies using live exchange rates. Fast, free, and updated automatically. Discount Calculator Calculate the sale price after a percentage discount, the amount you save, and the discount percentage from original and sale prices.