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All calculations update automatically as you type. No need to click calculate.
What is X% of Y?
Calculate a percentage of a number. Example: What is 15% of 200?
X is what % of Y?
Find what percentage one number is of another. Example: 30 is what % of 200?
X is Y% of what?
Find the base value when you know the percentage. Example: 30 is 15% of what?
Percentage Change
Calculate the percentage increase or decrease between two values.
Increase/Decrease by %
Calculate a value after increasing or decreasing by a percentage.
Reverse Percentage
Find the original value before a percentage was added or removed.
Percentage Calculator
Solve any percentage problem quickly and accurately
What is Percentage Calculator?
Percentage Calculator helps you solve any percentage problem in seconds. Whether you need to find what percent one number is of another, calculate discounts, or figure out percentage changes, this tool does the math for you.
Why Would You Need to Calculate Percentages?
Percentages come up all the time in daily life. Here are some common situations:
- Shopping discounts: Figure out how much you'll save on a 25% off sale
- Grade calculations: Convert your test score to a percentage
- Tip calculations: Calculate a 15% or 20% tip at restaurants
- Price changes: See how much prices have increased or decreased over time
- Budget planning: Find what percentage of your income goes to rent or savings
How to Calculate Percentages - Step by Step
- Choose your calculation type: Pick from 6 different options like "What is X% of Y" or "Percentage Change"
- Enter your numbers: Type in the values you know
- See instant results: The answer appears automatically as you type - no button needed!
Key Features
- 6 calculation types: Handle any percentage problem you encounter
- Real-time results: Answers update instantly as you type
- Visual indicators: See at a glance if values increased or decreased
- Sample data: Try the calculator with one click to see how it works
- No math required: Just enter your numbers and get the answer
Tips for Best Results
- Use the "Percentage Change" option to compare old and new prices
- For discounts, use "X is what % of Y" with sale price and original price
- Click "Try Sample" to quickly understand each calculation type
Frequently Asked Questions
What's the difference between percentage and percentage points?
If something goes from 10% to 15%, it increased by 5 percentage points. But the percentage change is 50% (because 5 is 50% of 10).
How do I calculate a discount?
Use "What is X% of Y" - enter the discount percentage and the original price. Subtract the result from the original price to get your final cost.
Can I use decimals?
Yes! You can enter decimal numbers for precise calculations.