About our free Numbers tools
These everyday calculators take the maths out of common decisions. Work out your BMI, convert units of length, weight and temperature, see the monthly payment and full schedule for a loan, split a restaurant bill with a tip, or check how much you really save in a sale.
For games, classrooms and giveaways, flip a coin, roll any dice from d4 to d100 or pick names at random — all using your browser’s secure random number generator, so every result is fair. No sign-up and no downloads: just type your numbers and get an instant answer.