Percentage Calculator

Answer the three most common percentage questions instantly.

100% private. Everything runs in your browser. Your data never leaves your device.

Percentage Calculator

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What does this tool do?

This calculator handles the three most common percentage questions: what is X% of a number, what percent one number is of another, and the percentage increase or decrease between two numbers. Instant, free, and works in your browser.

How to use Percentage Calculator - Free Online Tool

  1. Choose the type of percentage calculation you need.
  2. Enter your two numbers.
  3. The answer updates instantly.
  4. Copy the result if you need it.

Example

What is 15% of 200?

Before

Question
15% of 200

After

Answer
30

15 ÷ 100 × 200 = 30.

Excel formula alternative

Prefer a formula? You can achieve a similar result with percentage:

part = percent / 100 * whole

In Excel: =15%*200. This tool covers all three common percentage questions without typing formulas.

When should I use this tool?

Working out a tip or commission
Finding a percentage of a total
Checking what share one value is of another
Quick tax or fee estimates
Homework and study help
Everyday shopping math

Frequently Asked Questions

Divide the percent by 100 and multiply by the number. For example, 15% of 200 is 0.15 × 200 = 30.

Divide the part by the whole and multiply by 100. 30 out of 200 is 30 ÷ 200 × 100 = 15%.

No. The calculation runs entirely in your browser.

Yes. It shows the percentage change between two numbers, including the direction.

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