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Percentage Calculator

Calculate percentages, increases and decreases

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About This Tool

Percentage Calculator is an online tool that helps you quickly compute percentages in three modes: finding X% of Y, determining what percentage X is of Y, and calculating the percentage change from X to Y. All calculations happen in real time as you type, with formula breakdowns shown for each result.

Key Features

Quick Preview

Use Cases

calculator

Frequently Asked Questions

What is the Percentage Calculator?

The Percentage Calculator is an online tool that helps you compute percentages in three modes: finding a percentage of a number, determining what percentage one number is of another, and calculating percentage change between two values. It runs entirely in your browser with no data sent to any server.

What calculation modes are available?

There are three modes: "What is X% of Y?" computes a percentage of a value; "X is what % of Y?" finds the ratio of two numbers as a percentage; and "Percentage change from X to Y" calculates the increase or decrease between two values.

Does the calculator update results in real time?

Yes, results update automatically as you type in each input field. You can also click the Calculate button to compute all three modes at once, or use Clear All to reset everything.

Does it show the formula used for each calculation?

Yes, each calculation mode displays the full formula below the result, so you can see exactly how the answer was derived. This is helpful for learning or verifying your own manual calculations.

Can I use the Percentage Calculator on my phone?

Yes, the Percentage Calculator is fully responsive and works on all devices including smartphones, tablets, and desktop computers. The layout adapts to smaller screens for comfortable use.