About the Percentage Calculator
Our free online percentage calculator handles the most common percentage tasks. Calculate a percentage of a number, find what percent one number is of another, or compute percentage increase and decrease. Ideal for shopping discounts, grade calculations, financial analysis, and everyday math.
How to Use
- Select one of three calculation modes from the tabs
- Enter the required numbers in the input fields
- Click "Calculate" to see your result instantly
Features
- Percent of a number (e.g., 15% of 200 = 30)
- What percent is X of Y (e.g., 30 of 200 = 15%)
- Percentage increase or decrease between two values
- 100% free with no registration required
Frequently Asked Questions
Select "% of a Number" mode, enter the percentage and the number, then click "Calculate". The formula is: (percentage / 100) × number.
Select "X is What % of Y" mode, enter both values, then click "Calculate". The formula is: (X / Y) × 100.
Select "% Increase/Decrease" mode, enter original and new values. The formula: ((new - original) / original) × 100.
Yes, the percentage change mode automatically handles decreases, showing negative percentages when the new value is less than the original.
Yes, our calculator uses precise mathematical formulas with up to 4 decimal places for results, ensuring accurate percentage calculations every time.