How to Use the Percentage Calculator
Select Mode
Choose the type of calculation you need (what is, increase, decrease, or difference).
Enter Values
Type in your numbers and see instant results as you type.
Get Results
Your answer appears automatically with clear explanations.
Try Examples
Click quick examples to see how different calculations work.
Common Percentage Calculations
- What is X% of Y? - Find a percentage of a number (e.g., 20% of 100 = 20)
- Percentage Increase - Add a percentage to a number (e.g., 100 + 15% = 115)
- Percentage Decrease - Subtract a percentage from a number (e.g., 200 - 25% = 150)
- Percentage Difference - Find what percentage one number is of another
Why Use Our Percentage Calculator?
- Instant Results - Get answers as you type, no waiting
- Multiple Modes - Four calculation types in one tool
- 100% Free - No registration, no limits, no ads
- Mobile Friendly - Works perfectly on phones, tablets, and computers
- Accurate - Precise calculations you can trust
Real-World Uses
Percentage calculations are essential for:
- Shopping - Calculate discounts and sales (30% off $80 = $56)
- Finance - Interest rates, tax calculations, investment returns
- Business - Profit margins, growth rates, commission calculations
- School - Test scores, grade calculations, statistics
- Tips - Restaurant gratuity (15% tip on $45 = $6.75)
Frequently Asked Questions
What calculations can this tool perform?
This tool supports four main calculations: 'What is X% of Y?', 'Percentage Increase', 'Percentage Decrease', and finding the 'Percentage of' one number relative to another.
Can I use decimal numbers?
Yes, our calculator fully supports decimal numbers (e.g., 25.5% of 150.75) for precise calculations.
How do I calculate a discount?
To calculate a discount (e.g., 20% off), select the 'Percentage Decrease' mode. Enter the original price and the discount percentage to see the final price and amount saved.
Is this calculator free?
Yes, it is 100% free to use with no limits or registration required.
Is my data private?
Yes. All calculations happen instantly in your browser. We do not store or track the numbers you enter.