Pick the calculation you need from the dropdown, enter the two numbers, and the result updates as you type.
Percentage Calculator
Work out a percentage of a number, the reverse (what percent one number is of another), or a percent change. Pick the calculation you need from the dropdown, enter the two numbers, and the result updates as you type - no button to click.
Use it for a discount, a tax add-on, a grade, or comparing two values as a percent change.
Switch calculations at any time; the two number fields carry over so you can compare results without re-typing them.
The calculation runs locally in the browser - no upload and no account. Nothing you type is stored beyond the page session or sent to an analytics or tracking service.
The result is a general estimate, not financial or professional advice.
Frequently Asked Questions
What does Percentage Calculator do?
Work out a percentage of a number, the reverse (what percent one number is of another), or a percent change.
When should I reach for percentage calculator?
Use it for a discount, a tax add-on, a grade, or comparing two values as a percent change.
What complementary tools work well alongside percentage calculator?
Switch calculations at any time; the two number fields carry over so you can compare results.