Percentage Calculator
Quickly work out percentages, ratios and percentage change, answers appear as you type.
What is % of ?
= ,
is what percent of ?
= ,
Percentage change from to ?
= ,
Your privacy is safe, this tool runs entirely in your browser. Nothing you enter is uploaded to or stored on our servers.
More Calculators
How to use Percentage Calculator
- 1Pick the calculation you need from the three boxes.
- 2Enter your numbers in the fields.
- 3The answer appears instantly as you type.
- 4Use the result anywhere you like.
About the Percentage Calculator
This free percentage calculator handles the three most common percentage problems in one place: finding a percentage of a value, expressing one number as a percentage of another, and calculating the percentage increase or decrease between two numbers.
It is perfect for discounts, tips, test scores, statistics and everyday maths. Results update live as you type, and everything is calculated privately in your browser.
Frequently asked questions
What can this percentage calculator do?
It can find a percentage of a number, work out what percentage one number is of another, and calculate the percentage increase or decrease between two numbers, all instantly.
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 20% of 150 is (20 × 150) ÷ 100 = 30. The first box does this for you.
How do I work out what percentage one number is of another?
Divide the first number by the second and multiply by 100. For example, 30 out of 150 is (30 ÷ 150) × 100 = 20%. Use the second box for this.
How do I calculate percentage increase or decrease?
Subtract the old value from the new value, divide by the old value, then multiply by 100. A jump from 80 to 100 is a 25% increase. The third box handles both increase and decrease.
Is the percentage calculator free to use?
Yes, completely free with instant results and no sign-up.
Is my data private?
Yes, all calculations run in your browser and nothing is stored or uploaded.