Math · Free tool
Percentage Calculator
Calculate percentage changes, discounts, taxes, tips, and reverse percentages.
Instant resultsPrivate by defaultNo sign-up
Percentage amount3015% of 200
About this percentage calculator
Handle common percentage questions such as increases, discounts, taxes, tips, and finding an original value from a final amount.
How to use it
- Choose the percentage calculation you need.
- Enter the known values.
- Read the calculated result instantly.
Common uses
- Check a sale discount
- Calculate tax or a tip
- Measure percentage change
Common questions
Can I calculate a reverse percentage?
Yes. Use the reverse calculation to find the original amount before an increase or decrease.
How are results rounded?
The calculator keeps useful precision and formats the displayed result for readability.