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Live results as you type — no waiting.
FAST
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Live Preview
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Fill the fields on the right and see results instantly.
LIVE UPDATESRESULT
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Key Features
Built for speed & clarity
Everything you need, nothing you don't. Designed to keep you focused.
Accurate
Precise output every single time.
EXACTCopy & Export
One-click copy for reports and notes.
EXPORTFlexible
Adjust options without losing data.
OPTIONSResponsive
Works beautifully on any device.
ANY DEVICEPrivate
100% client-side. No data leaves your browser.
SECURE
FAQ
Good to know
How does this tool work?
Fill the fields on the right — results appear instantly in the preview panel.
Is my data safe?
Yes. Everything runs in your browser. Nothing is uploaded or stored on any server.
Can I use this on mobile?
Absolutely. The interface is fully responsive and works on any screen size.
Do I need an account?
No signup, no login. Just open the tool and start using it.
Done!
Free online percentage calculator with three powerful modes: find X% of Y, determine what percent X is of Y, and calculate percentage increase or decrease between two values.