Calculator
MathPercentage Calculator
Free online percentage calculator with 5 different calculation types. Calculate percentage of value, percentage change, increase/decrease, and more. Perfect for discounts, taxes, and financial calculations.
What is a Percentage Calculator?
A percentage calculator is a mathematical tool that helps you perform various percentage-related calculations quickly and accurately. It's essential for financial planning, business calculations, academic work, and everyday life situations.
Types of Percentage Calculations
1. Calculate Percentage of a Value
Find what a certain percentage of a number equals. For example, 25% of 200 = 50.
2. Calculate What Percentage One Number is of Another
Determine what percentage one number represents of another. For example, 50 is 25% of 200.
3. Calculate Percentage Change
Find the percentage increase or decrease between two values. For example, from 100 to 150 is a 50% increase.
4. Increase or Decrease by Percentage
Calculate the result of increasing or decreasing a number by a certain percentage. For example, 200 increased by 25% = 250.
5. Find the Original Value (X)
Determine the original value when you know a number and what percentage it represents. For example, if 50 is 25% of X, then X = 200.
Common Applications
- Financial calculations (interest rates, discounts, taxes)
- Business analysis (profit margins, growth rates)
- Academic work (statistics, data analysis)
- Shopping (discounts, sales tax)
- Investment planning (returns, portfolio analysis)
- Grade calculations (test scores, GPA)
- Population studies (growth rates, demographics)
- Scientific research (error margins, confidence intervals)
Mathematical Formulas
- Percentage of Value: (percentage ÷ 100) × value
- What Percentage: (number ÷ total) × 100
- Percentage Change: ((new - old) ÷ old) × 100
- Increase/Decrease: value ± (percentage ÷ 100) × value
- Find X: (number ÷ percentage) × 100
