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.
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How to use
- Choose whether you want "X% of Y" or "X is what % of Y".
- Enter your two numbers.
- 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
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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.