Percentage Calculator
Calculate percentages, reverse percentages, and percent change.
About this tool
Solve everyday percentage problems: portions, ratios, and percent change between two values — ideal for school, finance, and analytics.
How to use
- Pick a calculation mode.
- Enter the values.
- Read the result instantly.
Examples
- What is 18% of 250?
- 40 is what percent of 200?
- Percent change from 80 to 100.
Benefits
- Three common modes
- Clear results
- No ads interrupting math
- Works offline after load
Frequently asked questions
How is percent change calculated?+
((new − old) / old) × 100. Positive means an increase; negative means a decrease.
Can I calculate discounts?+
Yes via percent of, or use our dedicated Discount Calculator for final price and savings.
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