Percentage Calculator
Three percentage calculations in one tool: 'What is X% of Y?', 'X is what percent of Y?', and 'percent increase / decrease from X to Y?'. Pick the mode and fill in the two numbers. Runs locally in your browser.
Privacy
Runs entirely in your browser — nothing is sent to any server.
Cost
Free. No sign-up, no watermark.
Type
Calculator
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Frequently asked
Is Percentage Calculator free to use?
Yes. Percentage Calculator is completely free with no sign-up, no watermark, and no usage limits. Toolsly does not charge for any of its tools.
Do my files and data stay private?
Yes — Percentage Calculator runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.
How does Percentage Calculator work?
Open Percentage Calculator, paste or fill in the input fields, and the result updates instantly. Everything runs in your browser — no upload, no waiting.
Which browsers does Percentage Calculator support?
Any modern browser works — Chrome, Firefox, Safari, and Edge on desktop and mobile. Percentage Calculator uses standard web APIs and does not require any plugin, extension, or sign-up.