Percentage Calculator

Calculate percentages, percentage relationships, and increases or decreases — instantly.

From working out a discount to figuring out exam marks or a salary hike, percentage math comes up constantly. Lilu Baba's Percentage Calculator covers the three most common percentage questions in one tool: a percentage of a value, what percentage one number is of another, and percentage change.

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Percentage Calculator — frequently asked questions

Percentage increase = ((New Value − Old Value) / Old Value) × 100. Use the "% Increase / Decrease" tab and enter your from and to values.

Yes, completely free with no sign-up, and all calculations happen instantly in your browser.