Percentage Calculator
Calculate percentages, increases & decreases
Quick
Vibrant
Responsive
Result
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Result
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Result
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Quick Presets
Use the percentage calculator to find out X% of Y, and to calculate both increases and decreases in values with quick presets and responsive design.
Three Calculation Modes
| Mode | Formula | Use Case |
|---|---|---|
| Percentage | (X% of Y) | Find what X% of Y is |
| Increase | X + (X × Y%) | Calculate a percentage increase |
| Decrease | X - (X × Y%) | Calculate a percentage decrease |
⚡ Quick Presets
- 10%, 15%, 20%, 25%, 30%, 50%, 75%, 100%
⌨️ Keyboard Support
- Enter — Calculate in the active tab
- Auto-calculate — As you type (with debounce)
🎯 Example Calculations
| Mode | Input | Result |
|---|---|---|
| Percentage | 20% of 200 | 40 |
| Increase | 100 increased by 20% | 120 |
| Decrease | 100 decreased by 20% | 80 |
💡 Use Cases
| Use Case | Description |
|---|---|
| Shopping | Calculate discounts and sales tax |
| Finance | Calculate interest, tips, and commissions |
| Business | Calculate profit margins and markups |
| Education | Solve percentage problems in math |
| Everyday | Calculate portions, grades, and statistics |
📱 Responsive Design
- Desktop: Full layout with spacious cards
- Tablet: Adjusted padding and font sizes
- Mobile: Stacked tabs, larger touch targets
🔒 Privacy & Performance
- 100% client-side — All calculations in your browser
- No data storage — Nothing is saved or shared
- Fast — Instant calculations with zero latency