Calculate percentage change between two values. Free tool with percent increase/decrease formulas, examples, and step-by-step calculations.
Percentage change measures the difference between two values as a percentage of the original value.
Enter the old (original) value and new value to calculate the percentage change.
Get our free guide with 15+ percentage formulas, Excel templates, and business examples.
Percentage change is used to measure growth or decline over time. It's commonly used in finance, sales analysis, scientific measurements, and everyday comparisons.
Example 1: Price Increase
Old Price: $50 | New Price: $75
Change = (($75 - $50) / $50) × 100% = 50% increase
Example 2: Sales Decrease
Last Month: 1000 units | This Month: 800 units
Change = (($800 - $1000) / $1000) × 100% = 20% decrease
How do I calculate percentage change in Excel?
Use the formula: =((New_Value - Old_Value) / Old_Value) * 100. Format the cell as a percentage.
What is the difference between percent change and percent difference?
Percent change measures change over time from an original value. Percent difference compares two values without a time component, using the average as the denominator.
How to handle negative values in percentage change?
The formula still works with negative values. For example, going from -50 to -25 is a 50% increase (less negative), while going from 50 to -50 is a 200% decrease.