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Percentage Calculator

Solve percent of, percent change, increase, decrease and what percent questions from one specialized tool.

Enter the details for your calculation

Use the values that match the situation you want to evaluate with the percentage tool. Results update as the inputs change.

Calculation typei

Value X

Value Y

Result—

Difference—

Ratio—

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How to use this calculator

Using the calculator

Enter Calculation type i, Value X, Value Y. Solve percent of, percent change, increase, decrease and what percent questions from one specialized tool.

Reading the result

The result expresses the relationship between the values entered as a percentage and shows the corresponding numeric value where applicable.

Results are estimates based on the values entered. Review the Methodology and Calculator Disclaimer for important limitations.

Common questions

What is the difference between percentage of and percentage change?

Percentage of finds a part of a base number. Percentage change compares the difference between an old and new value with the original value.

Why is a 20 percent increase followed by a 20 percent decrease not back to the original?

The second percentage uses a different base. Increasing 100 by 20 percent gives 120. Decreasing 120 by 20 percent removes 24, leaving 96.

Should I enter 15 or 0.15 for 15 percent?

Follow the unit shown by the field. A field labeled percent usually expects 15 for 15 percent, while a formula written as a decimal may use 0.15.