Percentage Calculator
Work out percentages, percentage change and reverse percentages with the working shown.
To calculate a percentage, choose the type of question and enter your two numbers. The tool covers percentage of a value, percentage change, increases and decreases, and reverse percentages, and shows the working so you can check the arithmetic.
Runs in your browser- Privacy
- Runs entirely in your browser — nothing is uploaded
- Cost
- Free, unlimited, no sign-up
Frequently asked questions
Why is a 50% rise then a 50% fall not back to the start?
How to use the percentage calculator
- 1Choose the calculate.
- 2Set the first value (x).
- 3Set the second value (y).
- 4The result appears immediately — copy or download it.
Embed this tool
Put the working percentage calculator on your own site. It runs in your visitors' browsers exactly as it does here — free, no account, nothing uploaded.
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