Percentage Calculator

Calculate percentages in 4 ways: X% of Y, X is what % of Y, percentage increase from X to Y, and percentage decrease from X to Y. All calculations run locally in your browser.

X Y% ishow much

%—

X of Y Percentage

of—%

From X to Y Percentagechange

From to—

increase/savePercentage

%—

Common Use Cases

Use the Percentage Calculator online for these scenarios:

Daily work:: Bookmark this tool, use directly when needed, save time

Easy to use:: Runs in web browser, no software installation needed
Data safety:: All processing in your local browser, files not uploaded to server

Free to use:: Completely free, no signup, no watermarks, no feature limits
Cross-platform: Mac, Windows, Linux, mobile all work, just need a browser

Frequently Asked Questions

Here are the most common questions:

Q: Is this tool safe?
A: Yes. 100% client-side, data not uploaded, disappears when page closes.

Q: Do I need to register?
A: No. No login, no account, use directly.

Q: Are there usage limits?
A: No. Completely free, unlimited use.

Q: Does it support mobile?
A: Yes. All modern browsers work, including mobile.