What is the Percentage Change Calculator?
The percentage change calculator is a free online tool that helps you work out percentage change quickly and accurately. It uses the standard formula Change % = (new - old) / |old| x 100 and shows the result instantly as you type, along with a full breakdown so you can see exactly how the answer was reached.
How to use this calculator
- Enter the original value.
- Enter the new value.
- See the percentage change.
Formula used
Change % = (new - old) / |old| x 100Explanation of each input
- Original value โ the original value used in the calculation.
- New value โ the new value used in the calculation.
Understanding your result
- Change โ the calculated change in %.
- Difference โ the calculated difference.
Step-by-step calculation
For the example values 100 to 125:
- Apply the formula:
Change % = (new - old) / |old| x 100 - Substitute the values: (125-100)/100 x 100
- Result: +25%
Worked example
| Inputs | 100 to 125 |
|---|---|
| Working | (125-100)/100 x 100 |
| Result | +25% |
Benefits and practical uses
This calculator saves you time and reduces errors when you need percentage change. It is useful for students, professionals and anyone who wants a fast, reliable answer without manual calculation. Results update instantly, work in your browser and can be copied or shared in one click.
Assumptions and limitations
- Original value not zero.
Frequently asked questions
Increase or decrease?
A positive result is an increase, a negative one a decrease.
Disclaimer: Results are provided for general information. Please verify important figures independently.