Percentage Calculator – Calculate Percentages Online for Free

Our free Percentage Calculator makes it easy to calculate percentages without performing complicated manual calculations. Whether you need to find a percentage of a number, calculate a discount, determine a percentage increase, or compare two values, this online tool helps you get results quickly.

Percentages are used in everyday situations, including shopping, finance, education, business, statistics, and many other areas. With this calculator, you can solve common percentage problems in just a few steps.

What Is a Percentage?

A percentage represents a number or proportion expressed as a fraction of 100. The word percentage means "per hundred" and is represented by the symbol %.

For example:

10% means 10 out of 100.

25% means 25 out of 100.

50% means half of a quantity.

100% represents the entire quantity.

Percentages make it easier to compare values and understand proportions.

How to Use the Percentage Calculator

Using our online Percentage Calculator is simple:

Open the Percentage Calculator.

Select the type of percentage calculation you need, if the option is available.

Enter the required numbers.

Click the Calculate button.

View the result instantly.

The calculator can help with common percentage calculations without requiring manual formulas.

Common Percentage Calculations

1. Calculate a Percentage of a Number

Use this calculation to find a specific percentage of a given number.

Formula:

Percentage Value = (Percentage ÷ 100) × Number

Example:

What is 20% of 150?

(20 ÷ 100) × 150 = 30

The result is 30.

2. Calculate What Percentage One Number Is of Another

This calculation determines what percentage one value represents of another value.

Formula:

Percentage = (Part ÷ Whole) × 100

Example:

What percentage is 30 of 150?

(30 ÷ 150) × 100 = 20%

The result is 20%.

3. Calculate Percentage Increase

Percentage increase measures how much a value has increased compared with its original value.

Formula:

Percentage Increase = ((New Value − Original Value) ÷ Original Value) × 100

Example:

A product's price increases from 100 to 120.

((120 − 100) ÷ 100) × 100 = 20%

The price increased by 20%.

4. Calculate Percentage Decrease

Percentage decrease measures how much a value has fallen compared with its original value.

Formula:

Percentage Decrease = ((Original Value − New Value) ÷ Original Value) × 100

Example:

A product's price decreases from 200 to 150.

((200 − 150) ÷ 200) × 100 = 25%

The price decreased by 25%.

5. Calculate a Discount

A percentage discount shows how much money is deducted from an original price.

Formula:

Discount Amount = Original Price × (Discount Percentage ÷ 100)

Final Price = Original Price − Discount Amount

Example:

A product costs $80 and has a 25% discount.

Discount = 80 × 0.25 = $20

Final Price = 80 − 20 = $60.

Percentage Calculation Examples

Where Are Percentages Used?

Percentages are useful in many everyday and professional situations.

Shopping and Discounts

Calculate sale prices, promotional discounts, and savings when purchasing products.

Finance and Banking

Understand interest rates, investment returns, loan rates, and financial changes.

Education

Calculate exam scores, grades, attendance rates, and academic performance.

Business

Measure sales growth, profit margins, expenses, market shares, and business performance.

Health and Fitness

Understand percentage changes in weight, activity measurements, and other numerical data.

Statistics and Research

Compare proportions, analyze survey results, and interpret numerical information.

Percentage vs Percentage Points

Percentage and percentage points are not the same.

A percentage describes a proportion relative to a whole, while a percentage point measures the arithmetic difference between two percentages.

Example:

If an interest rate increases from 5% to 7%:

The increase is 2 percentage points.

The relative percentage increase is 40%.

This distinction is important when comparing interest rates, statistics, and financial data.

Common Percentage Calculation Mistakes

Avoid these common mistakes when working with percentages:

Dividing by the wrong original value when calculating percentage changes.

Confusing percentage points with percentage increases.

Applying a discount to the wrong price.

Forgetting to divide a percentage by 100 when converting it into a decimal.

Assuming that two successive percentage changes can simply be added together.

For example, a 20% increase followed by a 20% decrease does not return a value to its original amount.

Frequently Asked Questions

Is this Percentage Calculator free?

Yes. You can use our online Percentage Calculator for free without creating an account.

How do I calculate a percentage of a number?

Divide the percentage by 100 and multiply the result by the original number. For example, 20% of 150 is 30.

How do I calculate percentage increase?

Subtract the original value from the new value, divide the difference by the original value, and multiply by 100.

How do I calculate percentage decrease?

Subtract the new value from the original value, divide the difference by the original value, and multiply by 100.

How do I calculate a discount?

Multiply the original price by the discount percentage divided by 100. Then subtract the discount amount from the original price.

What is 50% of a number?

50% represents half of a number. For example, 50% of 200 is 100.

Can a percentage be greater than 100%?

Yes. A percentage can exceed 100% when the value being compared is greater than the reference value.

What is the difference between percentage and percentage points?

A percentage describes a relative proportion, while percentage points represent the direct difference between two percentages.

Calculate Percentages Now

Use our free Percentage Calculator to solve percentage problems quickly and accurately. Calculate proportions, discounts, increases, and decreases without complicated manual calculations.

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