Free Percentage Calculator

Calculate percentages quickly and accurately. Find a percentage of a number, determine what percentage one number is of another, or work out percentage changes with our free online calculator.

No registration required. Free to use.

Percentage Calculator

Find what a given percentage of a number equals.

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Free to useNo registration requiredWorks on desktop and mobileClear formulas and calculation steps

Percentage Calculator

Free Percentage Calculator makes it easy to solve common percentage problems without doing the math by hand. Enter your numbers, choose the type of calculation you need, and get a clear result instantly.

Whether you are checking a discount, comparing values, calculating a percentage increase, or working through a school problem, the calculator provides a quick way to verify your calculation.

What Is a Percentage?

A percentage is a way of expressing a number as a fraction of 100. The word "percent" means "per hundred," so 25% means 25 out of 100, or 0.25 as a decimal.

Percentages are used in everyday situations such as discounts, taxes, grades, business reports, financial calculations, statistics, and measuring changes between values.

For example, if 20 students are in a class and 5 are absent, the percentage of students absent is (5 ÷ 20) × 100 = 25%.

Percentage = (Part ÷ Whole) × 100

Our calculator performs these calculations automatically and shows the result so you can check how it was obtained.

Percentage Calculators for Different Problems

Different percentage questions require different formulas. Use the calculator that best matches what you are trying to find.

How to Calculate a Percentage

The method you use depends on the question you're trying to answer.

Finding a percentage of a number

Divide the percentage by 100 and multiply by the number: X% of Y = (X ÷ 100) × Y. For example, 20% of 150 is (20 ÷ 100) × 150 = 30.

Finding what percentage one number is of another

Divide the part by the whole and multiply by 100: Percentage = (Part ÷ Whole) × 100. For example, if you scored 45 points out of 60, your score is (45 ÷ 60) × 100 = 75%.

X% of Y = (X ÷ 100) × Y
Percentage = (Part ÷ Whole) × 100

Which Percentage Calculator Should I Use?

If you want to...Use
Find a percentage of a number
Find what percentage one number is of another
Find how much a value increased
Find how much a value decreased
Compare two values
Compare percentage values
Calculate a discount
Find the original value
Calculate growth between values

Where Are Percentages Used?

Percentages are part of many everyday calculations.

Shopping

Discounts, sale prices, tax, tips, and savings all rely on percentages. For example, a 20% discount on a $100 item reduces the price by $20.

Finance and Business

Businesses use percentages to track profit margins, revenue growth, cost changes, and investment returns, since percentages make it easier to compare values of different sizes.

Education

Test scores, grades, and attendance are usually expressed as percentages. For example, 45 out of 50 is (45 ÷ 50) × 100 = 90%.

Statistics and Data

Percentages are useful for expressing proportions and comparing results, such as survey responses, population statistics, and market shares.

Percentage vs. Percentage Points

Percentage and percentage points describe changes in different ways.

Suppose an interest rate increases from 4% to 6%. The difference is:

4% → 6%
2 percentage points
absolute change
50% relative increase
((6 − 4) ÷ 4) × 100

Understanding this distinction is particularly important when interpreting statistics, survey results, financial data, and reports. .

A Simple Way to Work With Percentages

Free Percentage Calculator is designed to make common percentage calculations easier to understand and verify.

Free to use
All of our percentage calculators are available without a subscription or registration.
Clear calculations
We show the formula and calculation steps wherever appropriate, so you can understand how the result was produced.
Multiple calculation types
Instead of using one formula for every situation, you can choose the calculator that matches your specific percentage problem.
Works on different devices
The calculators are designed to work on modern desktop and mobile browsers.
Useful for learning
Students can use the calculator to check their work and understand how percentage formulas are applied.

How to Use the Percentage Calculator

No account or sign-up is needed — the calculator works directly in your browser.

1
Choose the type of calculation
Select the percentage calculation that matches your question.
2
Enter your values
Enter the numbers required by the selected calculation.
3
Calculate
Select the calculate button to process your values.
4
Review the result
The calculator displays the result along with the relevant formula or calculation steps.
5
Reset if needed
Use Reset to clear the fields and perform another calculation.

Understanding Your Calculation

A calculator can provide the numerical result, but understanding the formula is equally important. That's why our percentage tools are designed to show the method behind the result where appropriate.

For example, when calculating what percentage 30 is of 120:

(30 ÷ 120) × 100 = 25%

This allows you to verify the result yourself instead of relying on a number without understanding where it came from. For important financial, academic, business, or professional decisions, always verify calculations and assumptions independently.

Explore Our Percentage Calculators

Learn More About Percentages

Percentages can look simple, but different percentage questions require different approaches. Our guides explain common percentage concepts using practical examples and formulas so you can understand when and how each calculation should be used.

Frequently Asked Questions

Divide the percentage by 100 and multiply by the number. For example, 20% of 150 is (20 ÷ 100) × 150 = 30.

Need to calculate another percentage?

Use our free percentage calculators to solve common percentage problems quickly and understand how the calculation works.