Percentage Calculator
Calculate percentages quickly and accurately with a simple online percentage calculator. Find a percentage of a number, work out percentage increases and decreases, compare two values, and calculate percentage changes in seconds.
Basic Percentage Calculator
Calculate common percentage problems quickly.
Percentage Difference Calculator
Compare two values and find their percentage difference.
Percentage Change Calculator
Find the percentage increase or decrease between two values.
Four Easy Ways to Work With Percentages
Percentages can describe a portion, compare two numbers, or show how much a value has changed. These common calculation methods cover the percentage problems people encounter most often.
Find a Percentage of a Number
To find a percentage of a number, convert the percentage into a decimal and multiply it by the number. For example, 20% of 150 is 30.
Find What Percentage One Number Is of Another
Divide the first value by the second value and multiply the result by 100. This tells you what percentage one number represents of another.
Calculate Percentage Difference
Percentage difference compares two values without treating either one as the starting value.
Calculate Percentage Change
Percentage change shows how much a value has increased or decreased compared with its original value.
How to Calculate a Percentage
Percentage Calculator tools make it easier to solve everyday percentage problems without working through the arithmetic manually. A percentage expresses a relationship as parts per hundred, which makes it useful for comparing quantities, measuring changes, understanding discounts, reviewing scores, and many other everyday calculations.
The basic idea is simple: a percentage can be converted to a decimal by dividing it by 100. You can then multiply that decimal by the number you want to evaluate. For example, to find 15% of 240, convert 15% to 0.15 and multiply 0.15 by 240. The result is 36.
Percentage Formula
One of the most useful percentage formulas is:
If a class has 40 students and 28 of them completed an assignment, the percentage who completed it is calculated by dividing 28 by 40 and multiplying the result by 100. That gives 70%.
Percentage Increase and Decrease
Percentage change is useful when you want to understand how a value moved from an original amount to a new amount. A positive result represents an increase, while a negative result represents a decrease.
For example, if a value rises from 80 to 100, the change is 20. Dividing 20 by the original value of 80 and multiplying by 100 gives a 25% increase.
Percentage Difference vs. Percentage Change
These two calculations are related but they answer different questions. Percentage change uses an original value as its reference point. Percentage difference compares two values using their average as the reference point. When neither value is considered the starting value, percentage difference is usually the more appropriate comparison.
Learn More About Percentages
Percentages help you compare values, calculate discounts, understand changes, and solve everyday math problems. To learn how percentages are calculated and how percent change works, read Khan Academy's guide to percentages .
Percentage Calculations in Everyday Life
Percentages appear in many situations. Here are a few simple examples showing how the calculations work.
Shopping Discount
A product costs $80 and has a 25% discount. The discount is $20, leaving a final price of $60.
Test Score
If you answer 45 questions correctly out of 50, your score is 90%.
Price Increase
If a price moves from $100 to $120, the increase is $20, which represents a 20% increase from the original price.
A Simple Percentage Calculator Built for Everyday Use
DoMorely focuses on practical tools that help you complete everyday tasks with less effort. Our percentage tool keeps the calculation process simple while providing several common percentage methods in one place.
Multiple Calculation Types
Solve common percentage problems without switching between different tools.
Instant Results
Enter your values and get the calculated result immediately.
Simple Interface
A clean interface keeps the calculation process easy to understand on desktop and mobile devices.
Useful Anytime
Use the online calculator for school, work, shopping, budgeting, comparisons, and everyday math.
Frequently Asked Questions About Percentages
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More Useful Online Tools
Percentage calculations are only one part of the DoMorely toolbox. Explore more practical tools designed to help you get everyday tasks done with less effort.
Ready to Calculate Your Percentage?
Enter your values above and get your percentage result in seconds.