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Percentage Change Calculator

Percentage Change Calculator

Calculate percentage increase or decrease between two values. Perfect for analyzing price changes, salary adjustments, business growth, and more.

100% FreeStep-by-step SolutionsReal-world Examples
Calculator
Choose calculation type and enter your values to find the percentage change

Original or initial value

New or ending value

Real-Life Examples
Click on any example to automatically fill the calculator
Shopping

Product price dropped from $50 to $40

Result: 20.0% decrease
Salary

Monthly salary increased from $3,000 to $3,300

Result: 10.0% increase
Stock

Stock price fell from $100 to $85

Result: 15.0% decrease
Sales

Company revenue grew from $1M to $1.2M

Result: 20.0% increase
What is Percentage Change?

Percentage change measures how much a value has increased or decreased relative to its original value, expressed as a percentage. It's essential for:

  • Finance: Stock price movements, investment returns
  • Business: Sales growth, profit margins, market share
  • Shopping: Discount calculations, price comparisons
  • Economics: Inflation rates, GDP growth, unemployment changes

Formula: Percentage Change = New Value−Old Value∣Old Value∣×100\frac{\text{New Value} - \text{Old Value}}{|\text{Old Value}|} \times 100

How to Calculate Percentage Change?

For Percentage Increase:

  1. Subtract starting value from final value
  2. Divide by the absolute value of starting value
  3. Multiply by 100 to get percentage

For Percentage Decrease:

  1. Subtract final value from starting value
  2. Divide by the absolute value of starting value
  3. Multiply by 100 to get percentage

Note: Starting value cannot be zero, as division by zero is undefined.

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