Percentage Calculator

Calculate what percent of a number, percentage change, increase, decrease, and more. 100% browser-based, private.

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Result: 12.5%

How to Use the Percentage Calculator

1

Select a Mode

Choose the type of percentage calculation you need from the three options.

2

Enter Your Numbers

Type your values into the X and Y input fields.

3

Get Instant Results

The result updates automatically as you type or change modes.

Frequently Asked Questions

To calculate what percent X is of Y, use the formula: (X / Y) × 100. For example, 25 out of 200 is (25/200) × 100 = 12.5%.
Percentage change measures how much a value has increased or decreased relative to its original value. The formula is: ((New - Original) / Original) × 100. A positive result is an increase, negative is a decrease.
To calculate a percentage increase, use: New Value = Original × (1 + Percentage/100). For example, a 20% increase of 50 is 50 × 1.2 = 60.
Yes, this percentage calculator is completely free to use with no limitations. All calculations are done in your browser for complete privacy.

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