This is a free percentage calculator. It handles the four percentage questions people ask most: what a percentage of a number is, what percent one number is of another, how much a number changed in percent, and what a number becomes after adding or subtracting a percentage.
How it works
All calculations run in your browser. The numbers you type are not sent anywhere. There is no sign-up and nothing to install.
Accuracy
Answers are rounded to 4 decimal places. The calculator uses standard arithmetic, but for decisions about money, tax or legal matters, check the result against your own records or an official source.
Use it like an app
On an iPhone, open the site in Safari, tap the Share button, then tap Add to Home Screen. On Android, open the browser menu and choose Install app or Add to Home screen. The calculator then opens full screen and also works without an internet connection.