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Percentage Calculator

Three common percentage calculations in one tool.

What is X% of Y?

% of
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Percentage Change

to
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X is what % of Y?

of
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Popular Queries

10% of 10020% of 10025% of 20050% of 10015% of 20010% of 500Change 100→120Change 100→15025 is what % of 10050 is what % of 200

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Free Percentage Calculator Online: Solve Any Percent Problem Instantly

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About This Tool

Free percentage calculator online — solve three types of percent problems in one tool: find X% of Y (e.g., what is 15% of 200?), calculate percentage change between two numbers (e.g., from 80 to 100), and find what percent X is of Y (e.g., 25 is what percent of 200?). No sign-up, instant results, works in your browser. Students use this for math homework, shoppers use it to calculate discount savings and final prices, marketers use it for growth rate calculations, analysts use it for variance reporting, and investors use it to track portfolio performance. All three calculators update as you type so you can see results in real time.

How to Use

  1. 1

    Choose the calculation type

    Select from: What is X% of Y, Percentage Change (from → to), or X is what % of Y.

  2. 2

    Enter the numbers

    Fill in the relevant fields. The result updates as you type.

  3. 3

    Read and copy the result

    The answer appears instantly. Copy it or continue with another calculation.

Frequently Asked Questions

How do I calculate a discount?+
Use the "What is X% of Y?" calculator. Enter the discount percentage as X and the original price as Y. The result is the discount amount. Subtract from the original price to get the final price.
How do I calculate percentage increase?+
Use the Percentage Change calculator. Enter the original value as "From" and the new value as "To". A positive result means increase; negative means decrease.
What is 15% of 200?+
15% of 200 = 30. Enter 15 in the percentage field and 200 in the value field of the "What is X% of Y?" calculator.

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