Calculators tools
Calculators
Quick, accurate everyday calculators with no sign-up and no ads in the way. Work out the number of days between two dates, add or subtract time, calculate a percentage or percentage change, split a bill or a tip, and more. Each calculator shows its working so you can check the result at a glance.
All Calculators tools (14)
Three common percentage questions.
Exact age from a date of birth.
Body Mass Index from height and weight.
Tip, total and split for a bill.
Monthly payment on a fixed-rate loan.
Time between two dates.
Ratio and scaled dimensions.
Add or remove VAT / sales tax.
Sale price and savings.
Convert between metric and imperial length.
Convert between metric and imperial weight.
Celsius ⇆ Fahrenheit ⇆ Kelvin.
Numbers ⇆ Roman numerals.
Convert a time between zones.