How do I use this calculator?

Simply enter your values in the input fields above and the result will calculate automatically in real time. All calculations happen instantly as you type.

How do I calculate a percentage?

To find X% of Y: multiply Y by X divided by 100. Example: 20% of 80 = 80 × 0.20 = 16.

What is the formula for percentage change?

Percentage change = ((New Value - Old Value) / |Old Value|) × 100. A positive result is an increase; negative is a decrease.

Percentage Calculator

Calculate percentages, percentage change, and find what percent one number is of another.

Calculate what X% of a number Y is.

% of =

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