Percentage Calculator

Work out a percentage, find a share of a total, or understand how much a number changed.

Calculation

YOUR RESULT

30

Example: 15% of 200 is 30. Change uses the absolute starting value, including for negative inputs.

Choose one of the three calculations, enter X and Y, and read the result immediately. For example, changing from 80 to 100 is a 25% increase.

Why can’t I use zero as the starting value?

A percentage change divides by the starting value. Division by zero has no defined result. Zero is allowed where it is not the divisor.

Split the bill down to the last cent.

A different unit. The same amount.

Two dates. One clear answer.