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TOOL · 85 · Data & Utility

Percentage Calculator

Four calculators in one: X% of Y, X is what % of Y, percentage change, and tip splitting.

Processed 100% in your browser — your files never leave your device.

What is X% of Y?

%
of

15% of 240 = 36

X is what % of Y?

is what % of

36 is 15% of 240

Percentage change

→

120 → 150 = 25%

Tip & split

Tip 8.7 · Total 66.7 · Each 33.35

How it works

  1. Step · 01

    Four calculators cover 95% of everyday percentage math: X% of Y, X is what % of Y, percentage change, and tip splitting.

  2. Step · 02

    Results update live as you type — no submit button.

  3. Step · 03

    Runs entirely in your browser, no data sent anywhere.

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Frequently asked questions

Is this tool really free?
Yes. Every tool on EasyFileMagic is 100% free with no signup, no watermarks, no page limits, and no software to install.
Are my files uploaded to a server?
No. Files are processed directly in your browser using JavaScript and WebAssembly. Nothing is uploaded to our servers, so your documents never leave your device.
Does it work on mobile?
Yes. The tools run in any modern browser on desktop, tablet, or mobile (Chrome, Edge, Safari, Firefox). Very large files may be slower on low-end phones.