How do I calculate a percentage of a number?

To find X% of a number, multiply the number by X and divide by 100. For example, 15% of 200 = 200 × 15 ÷ 100 = 30. This percentage calculator does the math for you instantly.

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

Divide the part by the whole and multiply by 100. For example, 30 is what percent of 120? → 30 ÷ 120 × 100 = 25%. Enter both numbers into this calculator to get the result automatically.

How do I calculate percentage change?

Subtract the old value from the new value, divide by the old value, and multiply by 100. A positive result means an increase, a negative result means a decrease. For example, from 50 to 75: (75 − 50) ÷ 50 × 100 = 50% increase.

What is the difference between percentage and percentile?

A percentage is a fraction of 100 (e.g., 85% means 85 out of 100). A percentile is a ranking — the 90th percentile means you scored higher than 90% of the group. They measure different things: percentage is a proportion, percentile is a relative position.

Percentage Calculator — Free Online Tool

Percentage Calculator

Calculate percentages instantly — find percent of a number, percentage change, and more.

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What is X% of Y?

Find a percentage of a number

Percentage (%)

Number

X is what % of Y?

Find what percentage one number is of another

Part

Whole

Percentage Change

Calculate the percent increase or decrease between two values

Original value

New value

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How to Use

Solve any percentage problem in seconds with this free online percentage calculator.

Percent of a number. Enter a percentage and a number to find the result — for example, "What is 25% of 200?" gives you 50.
What percent is X of Y. Enter two numbers to find what percentage one is of the other — for example, "15 is what % of 60?" gives you 25%.
Percentage change. Enter the original and new values to calculate the percent increase or decrease — for example, from 80 to 100 is a 25% increase.
Copy any result with one click for use in spreadsheets, reports, or homework.

All calculations run in your browser — no data is sent to any server.

Features

✓Percent of a number (X% of Y)
✓What percent is X of Y
✓Percentage change (increase/decrease)
✓Instant real-time calculation
✓One-click copy results
✓Fully client-side — no data leaves your browser

Frequently Asked Questions

How do I calculate a percentage of a number?: To find X% of a number, multiply the number by X and divide by 100. For example, 15% of 200 = 200 × 15 ÷ 100 = 30. This percentage calculator does the math for you instantly.
How do I find what percent one number is of another?: Divide the part by the whole and multiply by 100. For example, 30 is what percent of 120? → 30 ÷ 120 × 100 = 25%. Enter both numbers into this calculator to get the result automatically.
How do I calculate percentage change?: Subtract the old value from the new value, divide by the old value, and multiply by 100. A positive result means an increase, a negative result means a decrease. For example, from 50 to 75: (75 − 50) ÷ 50 × 100 = 50% increase.
What is the difference between percentage and percentile?: A percentage is a fraction of 100 (e.g., 85% means 85 out of 100). A percentile is a ranking — the 90th percentile means you scored higher than 90% of the group. They measure different things: percentage is a proportion, percentile is a relative position.