Free Percentage Calculator — 5 Calculation Modes
Calculate percentages in multiple ways: find what X% of Y is, determine what percentage X is of Y, calculate percentage change, reverse percentage, and increase/decrease by percentage.
Key Features
- 5 modes: of, what%, change, reverse, increase/decrease
- Live calculation as you type — no button needed
- Quick reference panel for common percentages
- Clean results with one-click copy
SimplyUtils vs Competitors
| Feature | SimplyUtils | CalculatorSoup | RapidTables | Omni Calculator |
|---|
| Multiple modes | ✓ | ✓ | ✓ | ✓ |
| No ads in calculation area | ✓ | ✗ | ✗ | ✗ |
| Live calculation | ✓ | ✗ | ✓ | ✓ |
| Free to use | ✓ | ✓ | ✓ | ✓ |
| 5+ modes | ✓ | ✗ | ✗ | ✓ |
Frequently Asked Questions
What is the percentage change formula?
Percentage change = ((New Value - Old Value) / |Old Value|) × 100. A positive result means an increase; negative means a decrease.
How do I find what percentage X is of Y?
Use the 'What % is X of Y?' tab. The formula is (X / Y) × 100.