Percent Change Calculator
Calculate the percentage change (increase or decrease) between two values.
Percent Increase
50.00%
How This Works
Percent change (increase or decrease) treats the first value as a fixed baseline and measures how far the second value moved relative to it. Swapping the two values gives a different result, unlike percent difference.
Formula
Percent Change = (New − Old) ÷ Old × 100
Example
Going from 40 to 60 is a 50% increase — the 20-point gap divided by the original value of 40.
Frequently Asked Questions
What is the percent change from 40.00 to 60.00?
A 50.00% increase.
How is percent difference different from percent change?
Percent change uses one value as a fixed "before" baseline (order matters). Percent difference treats both values symmetrically using their average as the base (order doesn't matter).