Percentage Calculator
Calculate percentages, percentage increase/decrease, and percentage changes quickly and accurately. Perfect for students, business, and everyday calculations.
🧮 Select Calculation Type
Basic Percentage Calculation
Result
Enter values to calculate
📐 Formula Used
💡 Quick Examples
✨ Key Features
Everything you need for percentage calculations
Multiple Calculation Types
Basic percentage, increase, decrease, and percentage change calculations
Instant Results
Real-time calculations with step-by-step explanations
Formula Display
See the mathematical formula used for each calculation
Quick Examples
Click on examples to quickly fill in common calculations
Mobile Friendly
Works perfectly on all devices - desktop, tablet, and mobile
Completely Free
No registration, no limits, no hidden costs - use as much as you want
🎯 Perfect For
Discover how different people use our percentage calculator
Students & Teachers
Perfect for math homework, statistics problems, and learning percentage concepts with step-by-step solutions.
Business & Sales
Calculate discounts, markups, profit margins, sales growth, and commission rates quickly and accurately.
Finance & Accounting
Calculate interest rates, tax percentages, investment returns, and financial ratios for budgeting and analysis.
Daily Life
Calculate tips, shopping discounts, grade percentages, and compare prices for everyday decisions.
❓ Frequently Asked Questions
Everything you need to know about percentage calculations
How do I calculate a basic percentage?
To find what percentage one number is of another, use the formula: (Part ÷ Whole) × 100. For example, to find what percentage 25 is of 100: (25 ÷ 100) × 100 = 25%.
What's the difference between percentage increase and percentage change?
Percentage increase adds a specific percentage to the original value. Percentage change calculates the difference between two values as a percentage of the original value, which can be positive (increase) or negative (decrease).
How do I calculate percentage decrease?
To decrease a value by a percentage, multiply the original value by (100 - percentage) ÷ 100. For example, to decrease 200 by 25%: 200 × (100 - 25) ÷ 100 = 200 × 0.75 = 150.
Can I calculate the original value from a percentage?
Yes! If you know the final value after a percentage change, you can find the original value. For example, if $120 represents a 20% increase, the original value is: 120 ÷ 1.20 = $100.
What are some common percentage calculation mistakes?
Common mistakes include: confusing percentage points with percentages, not converting percentages to decimals when multiplying, and using the wrong base value for percentage change calculations. Always double-check your formula and base values.