Percentage Calculator
Calculate percentages, percentage change, and percentage of a number instantly. Free and easy to use.
Enter your values, then press the button below:
How to calculate a percentage
To find a percentage of a number, multiply the number by the percentage and divide by 100. For example, 20% of 250 is 50.
Percentage change
Percentage change is calculated as the difference between two values divided by the original value, multiplied by 100.
Worked examples
What is 15% of 80? 80 × 15 ÷ 100 = 12.
50 is what percent of 200? 50 ÷ 200 × 100 = 25%.
Change from 80 to 100: (100 − 80) ÷ 80 × 100 = 25% increase.
Frequently asked questions
What is 10% of 100?
10% of 100 is 10.
Can I use this calculator on my phone?
Yes. The calculator is designed to work on desktop and mobile browsers.
How do I find what percent one number is of another?
Divide the first number by the second and multiply by 100. Choose "X is what percent of Y?" above and enter both numbers.
How do I calculate percentage change?
Subtract the original value from the new value, divide by the original value, then multiply by 100. A positive result is an increase and a negative result is a decrease.