Example
50 (increase) = +50%
Percent Change Calculator
Calculate percentage increase or decrease between two numbers instantly in your browser. Free online percent change calculator with step-by-step.
Enter the values below, then press Calculate (or press Enter). The calculator updates your results instantly. Try different values to see how your inputs change the outcome.
- Original value (from) — enter a numeric amount.
- New value (to) — enter a numeric amount.
- Review your results — the key output is highlighted, with supporting figures below.
Loading calculator…
Results
Result
| Detail | Value |
|---|---|
| Percent change (%) | |
| Absolute difference | |
| Absolute % change | |
| Direction |
What is this calculator for?
Measure the percentage increase or decrease from one value to another.
How to Use This Calculator
Enter the values below, then press Calculate (or press Enter). The calculator updates your results instantly. Try different values to see how your inputs change the outcome.
- Original value (from) — enter a numeric amount.
- New value (to) — enter a numeric amount.
- Review your results — the key output is highlighted, with supporting figures below.
What You'll Need
- Original value (from)
- a numeric amount · required
- New value (to)
- a numeric amount · required
About This Calculator
Percent change quantifies how much a value has grown or shrunk relative to its original size.
The formula divides the difference between the new and original values by the absolute value of the original, then multiplies by 100. A positive result is an increase; a negative result is a decrease. The tool reports both the sign and the absolute change.
Calculation runs entirely in your browser.
Worked Examples
Frequently Asked Questions
Why use the absolute value of the original?
It ensures a 50→25 drop and a 50→75 rise both report a clean ±50% regardless of sign quirks, which is the standard interpretation of "percent change".
What about going from 0 to a positive number?
Percent change from zero is undefined (you cannot divide by zero), so the tool flags it. Report the absolute increase in that case.