Percentage Change Calculator
Calculate percentage change from the original and new amounts. Use this free percentage change calculator for fast, clear results with no signup required.
Percentage Change Calculator guide
What it is for
Compare the price or split for percentage change calculator before completing a purchase.
How it is calculated
Percentage change = (new amount − original amount) / absolute value of original amount × 100. A zero original amount cannot be used as a percentage-change base.
Assumptions
The rate applies to the stated base; taxes, fees, and store rules are not known automatically.
Example
Changing from 80 to 100 gives (100 − 80) / 80 × 100 = 25%, an increase of 20 units.
Limitations
Check the receipt, local taxes, fees, minimums, and rounding before paying.