Instant calculations. No clutter.
Calculate a percentage of a number, such as 15% of 80.
Add tax to a net price, or extract it from a price that already includes VAT, GST, or sales tax.
Calculate adult body-mass index from weight and height, with the usual WHO bands.
Convert metres to feet, miles to kilometres, and other everyday length units.
Convert Celsius, Fahrenheit, and Kelvin for weather, recipes, and lab notes.
See the monthly payment on a home loan, plus total interest and total cost over the term.
Project how a principal grows with monthly compounding and an optional monthly deposit.
Estimate BMR with Mifflin-St Jeor, Harris-Benedict, or Katch-McArdle, then scale by activity and an optional cut.