Calculate discounts, VAT, tips, margin, percentage change, and the percentage of a number instantly.
Use this percentage calculator to work out discounts, VAT, tips, price changes, percentage difference and profit margin. Each result includes the formula, so you can see exactly how the answer was calculated.
How do you calculate a percentage? Multiply the number by the percentage and divide by 100.
How do you calculate percentage change? Subtract the old value from the new value, divide by the old value, then multiply by 100.
Does the calculator show the formula? Yes, every result includes the calculation used.
Percentage Calculator is a free browser-based utility for everyday percentage calculations. It is designed for students, shoppers, freelancers and small business owners who need quick answers with the formula shown beside the result.
The calculator runs locally in your browser. Entered numbers are used only to display the result on this page and are not sent to a server by this file.
Last updated: May 14, 2026.
This website does not ask you to create an account and does not intentionally collect personal information through the calculator fields. If advertising, analytics or embedded third-party services are enabled, those providers may use cookies, IP addresses, browser identifiers, web beacons or similar technologies to deliver, measure and personalize content and ads.
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This calculator is provided for general information and convenience only. Results should be checked before they are used for financial, tax, accounting, legal or business decisions.
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