Percentage Calculator
Formula: (X ÷ 100) × Y
Formula: (X ÷ Y) × 100
Formula: ((New - Original) ÷ Original) × 100
Formula: (Numerator ÷ Denominator) × 100
Key Features of Our Percentage Calculator
Free percentage calculator helps you solve four main percentage problems: calculate percentage of a number, determine what percent one number is of another, calculate percentage increase/decrease, and convert fractions to percentages. Perfect for discounts, tips, grades, and financial calculations.
- Four Calculation Modes - Handle all common percentage scenarios
- Real-time Examples - Quick sample calculations for common use cases
- Formulas Displayed - Learn how each calculation is performed
- Multiple Applications - Useful for discounts, tips, taxes, grades, and more
- Mobile-Friendly - Works perfectly on all devices
How to Use the Percentage Calculator
Select Calculation Type
Choose from four tabs: "X% of Y", "X is what % of Y", "% Increase/Decrease", or "Fraction to %".
Enter Your Values
Input the required numbers in the appropriate fields. Use the example buttons for quick setup.
Get Instant Results
Click "Calculate" to see your percentage result along with the formula used.
Switch Between Modes
Easily toggle between different percentage calculation types as needed.
Percentage Calculator FAQs
How do I calculate a percentage of a number?
Use the "X% of Y" tab. Enter the percentage (X) and the number (Y), and the calculator will compute (X ÷ 100) × Y.
How do I find what percentage one number is of another?
Use the "X is what % of Y" tab. Enter the part (X) and the whole (Y), and the calculator will compute (X ÷ Y) × 100.
How do I calculate percentage increase or decrease?
Use the "% Increase/Decrease" tab. Enter the original and new values, and the calculator will compute ((New - Original) ÷ Original) × 100.
How do I convert a fraction to a percentage?
Use the "Fraction to %" tab. Enter the numerator and denominator, and the calculator will compute (Numerator ÷ Denominator) × 100.