Percentage Change Calculator

Instantly calculate both percentage increase and percentage decrease between two numbers. This free online calculator also provides absolute change and identifies whether it’s an increase or decrease.

Change Amount
0
Percentage Change
0%
Change Type
—

About the Percentage Change Calculator

The CalculatorFox Percentage Change Calculator measures how much a value increases or decreases over time. Common uses include tracking price fluctuations, financial performance, test scores, or population growth.

Formulas Used

Change = New − Old
Percentage Change = ((New − Old) ÷ Old) × 100

Example Calculations

  • From 100 → 120: Change = +20, Percentage Change = +20%
  • From 80 → 60: Change = −20, Percentage Change = −25%
  • From 50 → 150: Change = +100, Percentage Change = +200%

Accepted Inputs

  • Positive and negative numbers supported
  • Decimals allowed (e.g., 12.5 → 15.8)

Frequently Asked Questions

  • How do you calculate percentage change?
    Subtract the old value from the new, divide by the old, then ×100.
  • Difference between increase and decrease?
    Positive result = increase; negative = decrease.
  • Can I enter decimals or negatives?
    Yes, both are supported for precise results.
  • How do I find absolute change?
    New − Old.
  • What is it used for?
    Finance, growth rates, score tracking, trend analysis.
  • Can results exceed 100%?
    Yes — large growth values can exceed 100% increase.