Online Tool Store
Percentage Gain Calculator
Enter an original and new value to calculate percentage gain or loss, absolute difference, and the formula used.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Percentage gain
+30.00%
Difference +36
Multiplier 1.30×
(156 − 120) ÷ 120 × 100 = 30.00%
Example shown — replace it with your own values.
How it works
- Enter the starting amount and the later amount.
- The calculator finds the absolute difference between them.
- It divides that difference by the original amount to show the relative gain or loss.
The formula
percentage change = (new value − original value) ÷ original value × 100
FAQ
How is percentage gain calculated?
Subtract the original value from the new value, divide the difference by the original value, then multiply by 100.
Why can’t the original value be zero?
Percentage change uses the original value as its denominator, so a change from zero has no finite percentage result.
Can I use this for a loss?
Yes. If the new value is lower, the result is displayed as a percentage loss.
How we compare
| Feature | Online Tool Store | Calculator Soup | Excel |
|---|---|---|---|
| No sign-in | Yes | Yes | Varies |
| Shows formula and multiplier | Yes | Yes | Manual formula |
For a quick, readable percent-change calculation with the working shown, this focused calculator is the simplest choice.