Percentage of a number
Find exactly how much a percentage represents of a given number. For example, calculate 20% of 150.
FREE ONLINE CALCULATOR
Percentage Calculator
Calculate percentages, find what percentage one number represents, and work out percentage increases or decreases instantly.
01 Choose calculation
02 Enter your values
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Enter the original number
Discover your percentage
Choose a calculation type, enter your values, and we'll calculate the answer instantly.
01 Choose a calculation
02 Enter your values
03 Click calculate
02 Enter your values
03 Click calculate
UNDERSTAND PERCENTAGES
Percentage made simple.
What percentage?
Find what percentage one number represents compared with another number.
Increase or decrease
Quickly calculate how much a value has increased or decreased between two numbers.
UNDERSTANDING PERCENTAGES
Percentage made simple.
Percentages are one of the simplest ways to understand how one number relates to another. Learn what they mean, when to use them, and why they are useful in everyday life.
01 · THE BASICS
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What is a percentage?
A percentage is a way of expressing a number as a part of 100. The word percentage literally means "per hundred."
For example, if you have 25 out of 100 items, you have 25%. If you have 50 out of 100, you have 50%. Percentages make it easier to compare values and understand proportions.
SIMPLE EXAMPLE
25 ÷ 100 × 100 = 25%
So 25 out of 100 is equal to 25%.
WHY WE USE THEM
Why are percentages useful?
Percentages turn numbers into an easy-to-understand format that can be compared across different situations.
Easy comparison
Percentages make it easier to compare numbers and understand how large or small a difference is.
Money decisions
Discounts, taxes, tips, interest rates and price changes are commonly expressed as percentages.
Track changes
Percentages show how much something has increased or decreased over time.
Understand data
Reports, surveys, statistics and business data often use percentages to communicate information.
FOUR COMMON CALCULATIONS
Which percentage calculation do you need?
Our calculator brings the most common percentage calculations together in one place.
01 Percentage of
What is X% of Y?
Use this when you know the percentage and the original number and want to find the actual amount represented by that percentage.
Example
What is 20% of 250?
20% of 250 = 50
Useful for discounts, taxes, tips, commissions, budgets and portions.
02 Find percentage
X is what percentage of Y?
Use this when you have a part and a total and want to know what percentage the part represents of the whole.
Example
50 is what percentage of 200?
50 is 25% of 200
Useful for test scores, survey results, budgets, progress and performance data.
03 Increase
What is a percentage increase?
A percentage increase tells you how much a value has grown compared with its original value.
Example
A price changes from $100 to $125.
Increase = 25%
Useful for salary growth, price changes, sales growth and business performance.
04 Decrease
What is a percentage decrease?
A percentage decrease tells you how much a value has fallen compared with its original value.
Example
A price changes from $200 to $150.
Decrease = 25%
Useful for discounts, reduced costs, falling prices, performance changes and savings.
IMPORTANT TO KNOW
Percentage change depends on the original value.
A difference between two numbers is not always the same as the percentage change. Percentage change measures that difference relative to where you started.
CHANGE 01 $100 → $125 Difference: $25 +25%
VS
CHANGE 02 $200 → $225 Difference: $25 +12.5%
EVERYDAY USES
Where do we use percentages?
Shopping
Discounts and price changes
Finance
Interest, fees and returns
Taxes
VAT, GST and other taxes
Education
Grades, marks and statistics
Business
Growth and performance
Personal savings
Budgets and financial goals
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Choose the calculation you need above and get your percentage result instantly.
Percentage Calculator
Free online Percentage Calculator to quickly find what is X% of Y, calculate percentage increase, percentage decrease, or reverse percentages. Simple, fast and accurate tool for students, shoppers and professionals.
How to Use the Percentage Calculator
- Choose the type of calculation (Percentage of, What percentage, Percentage increase or decrease).
- Enter the required values in the input fields.
- Click Calculate to get the result instantly.
Benefits of Using This Tool
- Supports all common percentage calculations
- No signup or installation needed
- Works completely in your browser
- Helpful for discounts, marks, salary hikes and more
Frequently Asked Questions
How do I calculate percentage increase?
Select “Percentage increase”, enter the original value and the new value, then click calculate.
Can I calculate reverse percentage?
Yes. Use the “What percentage” option to find what percent one number is of another.
Is this percentage calculator free?
Yes, completely free with no limits.