Percentage Calculator
Calculate percentages instantly — what is X% of Y, X is what percent of Y, and percentage increase or decrease between two numbers.
20% of 50 is 10
How to use Percentage Calculator
- Pick a calculation mode: X% of Y, X is what percent of Y, or percentage change.
- Type your numbers into the two fields.
- The result updates instantly as you type.
Frequently Asked Questions
How do I calculate what X percent of Y is?
Multiply Y by X and divide by 100. For example, 20% of 50 is (20 × 50) / 100 = 10. The calculator does this for you instantly.
How do I calculate percentage increase?
Subtract the original value from the new value, divide by the original value, and multiply by 100. Increase from 80 to 100 is (100 − 80) / 80 × 100 = 25%.
What is 20% of 50?
20% of 50 is 10. Type 20 and 50 into the calculator to verify.
Is this percentage calculator free?
Yes, it is completely free, works offline in your browser, and requires no sign-up. Your numbers never leave your device.
Can I use the percentage calculator on my phone?
Yes, the calculator is fully responsive and works on mobile, tablet, and desktop.