Percentage Calculator
Find a percentage of a number.
The result is percentage × value ÷ 100. For example, 10% of 200 is 20. Change the input or settings to update your result. Results update as you type. Up to 1,000,000 characters.
Your result
How to use Percentage
- Enter the values you want to calculate and choose the relevant units or settings.
- The result updates as you type. Adjust the available settings if needed.
- Review the result, then use Copy result or a download link when available.
How Percentage works
This percentage calculator finds a percentage of a number with the formula result = percentage × value ÷ 100. Enter the percentage and the value, and the answer updates as you type, so 10% of 200 shows 20 right away. It accepts decimals, negative numbers and percentages above 100, and it rounds the result to 12 significant digits. It answers one question, what is P% of V, so use the separate percentage change or discount tools when you need to compare two values or take a percentage off a price.
Before you start
Decide which number is the percentage and which is the whole amount. Type plain digits with a period for decimals, because values with commas, such as 1,500 or 1,5, are rejected.
A worked example
Enter 7.5 as the percentage and 1240 as the value, and the result is 93, because 7.5 × 1240 ÷ 100 = 93. A percentage of 150 with a value of 40 returns 60.
What to expect
Find a percentage of a number. The result is percentage × value ÷ 100. For example, 10% of 200 is 20.
Common questions
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For 15% of 80, that is 15 × 80 ÷ 100 = 12. You can also turn the percentage into a decimal first: 0.15 × 80 = 12. This calculator applies exactly that formula as you type.
How do I find what percent one number is of another?
Divide the part by the whole and multiply by 100. For example, 30 out of 120 is 30 ÷ 120 × 100 = 25%. This calculator works in the other direction, so you can check the answer by entering 25 as the percentage and 120 as the value, which returns 30.
Is 20% of 50 the same as 50% of 20?
Yes. Because the formula multiplies the two numbers and divides by 100, swapping them gives the same answer, and both equal 10. This makes some mental math easier: 8% of 25 is the same as 25% of 8, which is 2.
Why does adding 10% and then subtracting 10% not get me back to the start?
Each percentage applies to a different base. 100 plus 10% is 110, but 10% of 110 is 11, so subtracting it leaves 99. To undo a 10% increase, divide by 1.1 instead of taking 10% off the new amount.
Can I use a percentage over 100 or a negative percentage?
Yes. 150% of 40 returns 60, and -20% of 50 returns -10. Both fields accept any finite number, but you need to use digits with a period as the decimal separator. An empty field or a comma shows an error instead of a result.