Skip to content
Toolorio

Percentage Calculator

Calculate a percentage of a number, or find out what percentage one number is of another — switch modes and get an instant result.

of
30

Try next

Discount Calculator
Work out the final price after a percentage discount
Calculators

Your files are processed locally in your browser. They are not uploaded to our servers.

How to use

  1. Choose whether you want "X% of Y" or "X is what % of Y".
  2. Enter your two numbers.
  3. Read the result instantly below.

What is this tool?

Percentage Calculator handles the two most common percentage questions: finding a percentage of a number (like 20% of 150), and finding what percentage one number represents of another (like what percent 30 is of 150). Everything is calculated instantly in your browser as you type.

Common uses

  • Working out a discount, tip or tax amount
  • Checking what percentage of a budget or total has been spent
  • Calculating grades, scores or completion rates
  • Comparing growth or change between two numbers

FAQ

Can I use decimal numbers?

Yes, both fields accept decimals, so you can calculate precise percentages like 12.5% of 84.

What's the difference between the two modes?

"X% of Y" gives you a portion of a number, while "X is what % of Y" tells you what share X represents of Y.

Does this handle percentages over 100%?

Yes — you can enter any percentage value, including ones above 100%, for example to calculate growth.