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Percentage Calculator

Three essential percentage calculators in one: find what X% of a number is, calculate the percentage increase or decrease between two values, and determine what percentage one number is of another. All results update instantly as you type.

Find X% of a number

e.g. What is 25% of 200?

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or

Percentage increase / decrease

e.g. From 100 to 120 — how much change?

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or

What percent is X of Y?

e.g. 25 is what percent of 200?

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All three sections calculate independently in real time

How to use

  1. 1Use the "Find X% of a Number" section to calculate a percentage of any value — for example, 25% of 200.
  2. 2Use the "Percentage Change" section to find how much a value has increased or decreased — enter the original and new values to get the percentage change with direction (increase or decrease).
  3. 3Use the "What Percent is X of Y?" section to find what percentage one number represents of another — for example, 25 out of 200.
  4. 4All three calculators work independently and update in real time as you type — no need to press a button.
  5. 5Click the reset icon on any section to clear just that calculator without affecting the others.

Why Use This Tool?

Percentage calculations come up constantly — working out discounts, tracking growth, splitting costs, grading scores, and more. Having all three core percentage formulas in one place means you never have to remember which formula applies. Just pick the section that matches your question and type your numbers.

Frequently asked questions