About the Percentage Change Calculator
Calculate the percentage change between an old and new value — positive for increases, negative for decreases.
Also known as: percent change, change in percentage, growth percentage, percent difference over time.
How to use this calculator
- Enter old value, new value.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Open “Step-by-step” to see how the answer was worked out.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
% change = (New − Old) ÷ |Old| × 100
Worked example
Using the values pre-filled in the calculator above:
- Old value = 1,500
- New value = 1,830
the calculator returns:
- Percentage change: 22%
- Change: 330
- Multiplier: 1.22
Working
(1,830 − 1,500) ÷ |1,500| × 100 = 22%