Percentage Calculator

Calculate percentages, percentage increases, decreases and percentage differences quickly and accurately with clear step-by-step formulas.

Runs in your browser

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How to use

Every mode is a direct application of a quotient and a multiplier. The formulas are printed under each result so you can check the working.

How do I find what percentage one number is of another?

Divide the part by the whole and multiply by 100. For 5 out of 20 that is (5 / 20) x 100 = 25%.

What is the difference between increase and difference?

Increase starts from a base value. Percentage difference uses the average of the two values as the base, so it is symmetric.

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