Percent Change Calculator
Calculate the percentage increase or decrease between two values. See if a change is positive or negative and by how much. Free, instant.
↑ Increase of 25.00%
How it's calculated:
Change = ((100 - 80) / |80|) × 100 = 25.00%
Formula: ((New − Original) / |Original|) × 100
Percent Change Calculator — Measure Increases and Decreases
Enter an original value and a new value to see the percentage change.
The Formula
Percent Change = ((New Value − Original Value) / |Original Value|) × 100
A positive result means an increase; negative means a decrease.
Examples
Price went from $80 to $100: ((100 − 80) / 80) × 100 = +25% increase.
Stock dropped from $150 to $120: ((120 − 150) / 150) × 100 = −20% decrease.
When to Use Percent Change vs. Percent Difference
Use percent change when there’s a clear “before” and “after.” Use percent difference when neither value is the “original.”
Results are for informational and educational purposes only.