Percentage Calculator

What is X% of Y?

X is what % of Y?

Percentage Increase/Decrease

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About This Tool

The Percentage Calculator is a versatile tool designed to help you solve everyday math problems. Whether you need to find a percentage of a number, calculate what percentage one value is of another, or determine the percentage increase or decrease between two numbers, this tool provides instant and accurate results.

How to Use

  1. Find Percentage: Enter a percentage and a number to find what that percentage of the number is (e.g., 20% of 500 = 100).
  2. Find Percent Of: Enter a part and a total to find what percentage the part is of the total (e.g., 25 is 25% of 100).
  3. Percentage Change: Enter an old and new value to calculate the percentage increase or decrease between them.
  4. Click Calculate on any section to instantly see the result in your browser.

Why Choose OmniTools?

⚡ Instant Results

Zero server lag. All calculations run locally on your device for maximum speed.

🛡️ 100% Private

Your data never leaves your device. No uploads, no servers, no tracking.

Frequently Asked Questions

How do I calculate a percentage?

To find the percentage of a number, multiply the number by the percentage and then divide by 100. For example, 20% of 150 is (150 * 20) / 100 = 30.

What is percentage increase?

Percentage increase is the relative change between an old value and a new value. Formula: ((New - Old) / Old) * 100.

Is my math data private?

Yes! OmniTools performs all calculations locally on your device. Your numbers are never sent to a server.

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