Percentage Calculator

Calculate percentages, find what percent one number is of another, and perform various percentage calculations. Fast and accurate results.

What is a Percentage Calculator?

A percentage calculator is a tool that helps you perform various percentage calculations including finding what percent one number is of another, calculating a percentage of a number, and finding the original number from a percentage.

Percentages are used in many everyday situations including discounts, tips, taxes, interest rates, and statistical analysis. This calculator makes percentage calculations quick and easy.

How to Use the Percentage Calculator

  1. Select calculation type: Choose what type of percentage calculation you want to perform.
  2. Enter values: Input the numbers based on the selected calculation type.
  3. Calculate: Click "Calculate" to see the result.

Calculation Types

What is X% of Y?

Calculates a percentage of a number. Example: What is 25% of 200? Answer: 50.

X is what % of Y?

Finds what percentage one number is of another. Example: 50 is what % of 200? Answer: 25%.

X is Y% of what number?

Finds the original number when you know a percentage of it. Example: 50 is 25% of what number? Answer: 200.

Frequently Asked Questions

How do I calculate a percentage?

To calculate X% of Y, multiply Y by (X/100). For example, 20% of 100 = 100 × (20/100) = 20.

How do I find what percent one number is of another?

Divide the first number by the second number, then multiply by 100. For example, 25 is what % of 100? (25/100) × 100 = 25%.

Can I use decimals?

Yes, you can enter decimal numbers for both values. The calculator will handle decimal percentages and values accurately.

What if the result is negative?

The calculator will show negative results if you enter negative numbers. In most real-world scenarios, percentages are positive values.

Related Calculators

Percentage Increase Calculator →Percentage Change Calculator →Reverse Percentage Calculator →

Cite This Calculator

Reference this calculator on your website or in your work using the citation below:

HTML Citation Code:

<p>Calculator: <a href="https://onlinecalculator.co.uk/percentage/percentage-calculator" target="_blank">Percentage Calculator</a> - OnlineCalculator.co.uk</p>

APA Style Citation:

OnlineCalculator.co.uk. (2025). Percentage Calculator. Retrieved from https://onlinecalculator.co.uk/percentage/percentage-calculator

Note: This calculator is free to use and reference. No permission required for educational or commercial citation.