Percentage Calculator
Calculate discounts, percentage changes, and ratios instantly. Perfect for shopping, finance, statistics, and data analysis
Discount Calculator
Calculate discounts and sale prices
How to Use Each Mode
Discount Calculator
Perfect for shopping! Enter the original price and discount percentage to find the final price and savings.
Percentage Change
Compare old and new values to find the percentage increase or decrease. Great for analyzing growth rates.
Percentage Of
Find what X% of a number is. Useful for calculating tips, tax, or any percentage-based calculations.
What Percentage
Find what percentage one value is of another. Perfect for statistics and data analysis.
How to Use
- 1
Select mode
Choose from Discount, Change, Percentage, or Ratio calculator
- 2
Enter values
Input the required values based on the selected mode
- 3
View results
Results are calculated automatically as you type
- 4
Copy or share
Use the copy/share buttons to save or share your calculations
Frequently Asked Questions
How do I calculate a percentage of a number?
How do I calculate a percentage of a number?
To find X% of a number, multiply the number by X and divide by 100. For example, 25% of 80 = (25 × 80) ÷ 100 = 20. Use our "Percentage Of" mode for quick calculations.
What's the formula for percentage change?
What's the formula for percentage change?
Percentage change = ((New Value - Old Value) / Old Value) × 100. A positive result indicates an increase, negative indicates a decrease. For example, from 50 to 75 is a 50% increase.
How do I calculate the original price before a discount?
How do I calculate the original price before a discount?
If you know the discounted price and discount percentage, divide the discounted price by (1 - discount rate). For example, if an item costs $80 after a 20% discount: $80 ÷ 0.80 = $100 original price.
What's the difference between percentage points and percent?
What's the difference between percentage points and percent?
A percentage point is the unit for the difference between percentages. If interest rates rise from 3% to 5%, that's a 2 percentage point increase, but a 66.7% increase. Always clarify which you mean to avoid confusion.