What is X% of Y? Percentage change, markup, discount, tip, and more — instant results.
All calculations happen instantly in your browser — nothing is stored or sent anywhere.
Pick from six common percentage operations — percent of a number, percentage change, discount, markup, and more.
Fill in the input fields for your chosen calculation. The result updates in real time as you type.
The right panel shows your answer with a plain-English explanation and related values for context.
Copy the result to your clipboard with one tap, or switch to a different calculation type without losing your numbers.
Six percentage tools in one page — fast, private, and always free.
Results appear as you type — no button to press, no waiting for a server.
Quickly find sale prices, tip amounts, VAT totals, and margin calculations.
Calculate percentage increase or decrease between any two values — great for stats and finance.
All calculations run locally in your browser. No data ever leaves your device.
Copy your result to the clipboard instantly and paste it wherever you need it.
No sign-up, no subscription, no limits. Use it freely as many times as you need.