Percentage Calculator

Calculate percentages, increases, decreases and ratios.

Free · Runs in your browser · Last updated 2026-05-03

What is X% of Y?

% of =

X is what % of Y?

is % of

Percent change from X to Y

from to = %

Tip / discount

Amount × % = (total )

About this tool

Six common percentage calculations in one tool: X% of Y, X is what % of Y, percent change, increase/decrease, and tip.

Privacy

All processing for Percentage Calc happens locally inside your browser using JavaScript. Your input is never uploaded to a server, logged, or shared with third parties.

Frequently asked questions

Is the Percentage Calc free to use?

Yes. Percentage Calc is completely free for both personal and commercial projects. There are no usage limits, no sign-up, and no premium tier.

Is my data safe when I use Percentage Calc?

All processing happens locally in your browser using JavaScript. Your input is never uploaded to our servers, logged, or shared with any third party.

Does Percentage Calc work offline?

Once the page has loaded, the tool runs entirely client-side. You can disconnect from the internet and it will keep working in the same browser tab.

Which browsers are supported?

Percentage Calc works in all modern browsers, including the latest versions of Chrome, Firefox, Safari, Edge, Brave, and Opera, on desktop and mobile.

Do I need to install anything?

No. Percentage Calc runs in any modern web browser with no installation, browser extension, or account required.

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