Percentage Calculator
Calculate percentages easily with four different calculation modes. Perfect for finance, shopping, grades, and everyday math.
Calculation Modes
1. X% of Y
Find what percentage of a number is. Example: What is 15% of 200?
2. X is ?% of Y
Find what percentage one number is of another. Example: 30 is what percent of 150?
3. Percentage Change
Calculate the percentage increase or decrease between two values.
4. Add/Subtract Percentage
Add or subtract a percentage from a value. Perfect for tips, taxes, discounts.
Common Uses
- Shopping - Calculate discounts and sale prices
- Finance - Interest rates, investment returns
- Grades - Calculate test scores and GPA
- Tips - Calculate gratuity amounts
- Business - Profit margins, markups
Formulas
| Calculation | Formula |
|---|---|
| X% of Y | (X/100) × Y |
| X is ?% of Y | (X/Y) × 100 |
| % Change | ((New-Old)/Old) × 100 |
FAQ
How do I calculate a 20% tip?
Use "X% of Y" mode: Enter 20 as percent and your bill amount as value.
How do I find the sale price?
Use "Add/Sub %" mode with subtract: Enter original price and discount percentage.