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Percentage Change Calculator — Increase and Decrease

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Percentage Change Calculator

Find the percentage difference between two values, or calculate a new value after a percentage increase or decrease.

Everything runs in your browser — nothing sent to any server. All free tools

Frequently Asked Questions

What is the formula for percentage change?
% Change = ((New Value – Original Value) / |Original Value|) × 100. A positive result is an increase, negative is a decrease.
How do I calculate a 20% increase?
Multiply the original value by 1.20. Example: 200 × 1.20 = 240. Or use this calculator’s New Value tab.

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