Percentage Calculator

Three common percentage questions in one place. Results update as you type.

Runs in your browser. Nothing is uploaded.

What is X% of Y?
% of = –
X is what % of Y?
is – of
Percentage change
From to = –

How to use it

  1. Pick the question that matches yours.
  2. Enter the two numbers.
  3. Read the result.

Common uses

  • Working out a tip or commission
  • Comparing prices
  • Tracking growth between two figures

Questions

How is percentage change calculated?

(new - old) / old x 100. A negative result is a decrease.

What if the starting value is zero?

Change from zero is undefined, so the tool shows a dash.

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