Percentage Calculator
Three useful percentage calculations in one tool: a percent of a value, what percent one number is of another, and the percentage change between two values.
Choose a calculation
Result
Enter both values to see the result.
How to use the Percentage Calculator
Start by choosing the calculation you need from the drop-down. The input labels change to match your choice, so you always know what to enter. Results appear automatically as you type.
- What is X% of Y? — perfect for discounts, tips and taxes.
- X is what percent of Y? — great for scores and shares.
- Percentage change — measures growth or decline between two values.
Frequently asked questions about percentages
How do I work out a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 25% of 200 is 200 × 25 ÷ 100 = 50. The calculator does this instantly when you enter both values.
How is percentage change calculated?
Subtract the original value from the new value, divide the result by the original value, then multiply by 100. A positive answer is an increase and a negative answer is a decrease.
What is the difference between percent and percentage points?
A "percent" change is relative to the starting value, while a "percentage point" is an absolute difference. Going from 10% to 15% is a rise of 5 percentage points but a 50% increase.