Percentage Calculator

Calculate percentages instantly — find percent of a number, what percent X is of Y, and percentage change.

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Percentage Calculator

Solve percentage problems including percent of a number, ratios, percentage change, percent difference, increases, decreases, and reverse percentages with formulas and step-by-step calculations.

What do you want to calculate?

Choose the type of percentage problem.

Percentage

Number

Common percentages

Step-by-step

Formula

(percentage ÷ 100) × number

Substitute the values

(15 ÷ 100) × 240 = 36

Explanation

Convert 15% to a decimal (0.15), then multiply it by 240.

Breakdown

Decimal equivalent

0.15×

Remaining value

204

15% of 240

Convert 15% to a decimal (0.15), then multiply it by 240.

Formula

(percentage ÷ 100) × number

(15 ÷ 100) × 240 = 36

Privacy

You can use this tool without an account. Processing stays in your browser; accounts are optional for favorites and history.

How to use

Choose the type of percentage calculation you need.
Enter the two values in the input fields.
The result updates instantly as you type.
Copy the result to your clipboard.

Examples

Find 15% of 240 → result: 36
30 is what percent of 120? → result: 25%
Price went from 80 to 100 → result: +25% increase

FAQ

Can I use decimals?

Yes, decimal values are supported for all inputs.

How is percentage change calculated?

Percentage change = ((new value - original value) / original value) × 100.

Is Percentage Calculator free?

Yes. Percentage Calculator is free to use on InfoChef, and the tool remains available without creating an account.

Does Percentage Calculator require login?

No. Login is optional and only adds convenience features such as favorites, recent tools, and synced history.

Can I use Percentage Calculator on mobile?

Yes. The tool page is designed to work on phones, tablets, laptops, and desktop screens.

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