Calculators Runs in your browser
Percentage Calculator
Calculate percentages 6 ways: X% of Y, X is what % of Y, % increase/decrease, % of total, tip %, tax %. With copy, history, and CSV export. 100% private.
100% Private Works Offline Instant
Calculate percentages 6 ways: X% of Y, X is what % of Y, % increase/decrease, % of total, tip %, tax %. With copy, history, and CSV export. 100% private. Everything runs locally in your browser — your data never leaves your device.
How to use
- Enter your input in the tool above.
- Adjust any options to your preference.
- Use the Copy or Download buttons to save the result.
- Everything happens locally — your data never leaves your browser.