Effortless Percent Calculator

Use this percent calculator to solve percent math fast and clean. You get answers for common tasks in seconds. Use it for sales and tips. It helps with grades and reports. Click Calculate or press Enter to run it. Results format neatly with helpful rounding.

How the Tool Works

Three calculators cover core percent cases. One finds what X percent of Y equals. One finds what percent one number is of another. One finds the whole from a part and its percent.

Use the first calculator to find a part of a whole. Enter a percent and a number, then run the math. The math uses percent divided by 100 times the number.

Use the second calculator to get percent of total. Enter the first number and the second number, then run it. It divides the first by the second and multiplies by 100.

Use the third calculator to find the total from a part. Enter the known value and the percent, then run it. It divides the value by the percent then multiplies by 100.

A Closer Look at the Features

Here is what each input means and how to read results.

Inputs

• Percentage fields accept whole numbers and decimals.
• Type percent as a value like 25 for 25 percent.
• Number fields accept integers and decimals.
• Leave units out, only enter numbers.

Outputs

• The first calculator shows the part as a number.
• The second calculator shows a percent next to the result.
• The third calculator shows the full total.
• Values round to two decimal places when needed.
• Trailing zeros drop after rounding for a clean look.

Notes and limits

• Empty fields show the message Please enter valid numbers.
• A zero second number in calculator two shows Cannot divide by zero.
• A zero percent in calculator three shows Cannot divide by zero.
• Press Enter in any field to run that calculator.
• The tool returns numbers only, no units or currency.

Step by Step Guide

1. What is X percent of Y

1. Enter the percent in the first field.
2. Enter the number in the next field.
3. Click Calculate or press Enter.
4. Read the result as the part of the number.

Example: 25 percent of 80 gives 20.

2. X is what percent of Y

1. Enter the first number in the left field.
2. Enter the second number in the right field.
3. Click Calculate or press Enter.
4. Read the percent shown next to the result.

Example: 20 is 25 percent of 80.

3. X is Y percent of what

1. Enter the known value in the first field.
2. Enter the percent in the next field.
3. Click Calculate or press Enter.
4. Read the result as the total number.

Example: 20 is 25 percent of 80.

Common use cases

• Sale price math, like 30 percent off 80 gives 24.
• Tip math, like 18 percent of 45 gives 8.1.
• Grade math, like 42 out of 50 gives 84 percent.
• Tax math, like 7.5 percent of 120 gives 9.
• Back out a full price, like 60 is 20 percent of 300.

This percent calculator keeps work clear and quick. Follow the steps, check the notes, and get answers you can trust.