Percentage Calculator
Calculate percentages, percentage of a value, percentage change, and discount percentage in your browser.
percentage calculatorpercent calculatorpercentage changediscount percentage
Result12.50%
25 is 12.50% of 200.
Use caseA is what % of B
Useful for completion rates, share of total, scores, and proportions.
About this tool
Calculate percentages, percentage of a value, percentage change, and discount percentage in your browser.
Your numbers are calculated locally in your browser and are not uploaded to a server.
How to use it
- Choose the calculation mode.
- Enter value A and value B.
- Read the result and explanation below the inputs.
Common use cases
- Calculate completion rates
- Find percent of a number
- Compare increases or decreases
- Check discount percentage
Common Percentage Questions
Percentage searches often come from practical comparison tasks. Choose the mode that matches the question rather than trying to rewrite the formula yourself.
| Question | Mode to use | Example |
|---|---|---|
| What percent is A of B? | A is what % of B | 25 is 12.5% of 200. |
| What is A% of B? | What is A% of B | 25% of 200 is 50. |
| How much did it change? | Percentage change | From 200 to 250 is a 25% increase. |
| How large is the discount? | Discount percentage | 1000 to 790 is 21% off. |
FAQ
Can it calculate percentage change?
Yes. Choose percentage change and enter the original and new values.
Can it calculate discounts?
Yes. Choose discount percentage and enter the original and sale prices.
Are my numbers uploaded?
No. The calculation runs in your browser.