Percentage Calculator
Solve the three most common percentage questions in one place: what is X% of a number, what percent is one number of another, and the percentage increase or decrease between two values. Percentages come up constantly in discounts, tips, tax, grades, growth rates and statistics, and it is easy to make a mistake doing them in your head. This calculator lays out each type clearly with its own inputs so you pick the one you need and get an instant, accurate answer. Whether you are checking a sale price, working out a markup, or measuring how much a number grew, the math is done for you, right in the browser.
How to use Percentage Calculator
- Choose the type of percentage calculation you need.
- Enter the two numbers the problem requires.
- Read the answer, updated instantly as you type.
Frequently asked questions
What kinds of percentage problems can this solve?
It handles the three common cases: what is X percent of Y, what percent one number is of another, and the percentage increase or decrease between two numbers.
How is "what percent of" calculated?
It divides the part by the whole and multiplies by 100. For example 30 out of 120 is 30 divided by 120 times 100, which is 25 percent.
Can it show a percentage increase or decrease?
Yes. Enter the original and new value and it returns the change as a percent, with the sign showing whether it went up or down.
What is Percentage Calculator?
Solve the three most common percentage questions in one place: what is X% of a number, what percent is one number of another, and the percentage increase or decrease between two values. Percentages come up constantly in discounts, tips, tax, grades, growth rates and statistics, and it is easy to make a mistake doing them in your head.
Is Percentage Calculator free to use?
Yes. Percentage Calculator is completely free, with no sign-up and no usage limits.
Does Percentage Calculator work in a web browser?
Yes. Percentage Calculator runs in any modern web browser. There is nothing to download or install.
Is my data private with Percentage Calculator?
Yes. Percentage Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.
Badge
Link this tool from a README, doc or site. The badge links back to this page.
[](https://yourhack.ai/percentage-calculator)