Percentage Change Calculator
🔢 Number, percentages & ratio. Use the Percentage change formula to find change, new value, original value: pick the value you want, type the others, and the answer updates as you go.
Positive = an increase, negative = a decrease.
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| Change | % |
| New value | no unit |
| Original value | no unit |
Worked example
Find the change when New value = 50, Original value = 40.
Using \% change = (new - original)/original × 100: Change = 25 %.
Frequently asked questions
What is the formula for Percentage change?
\% change = (new - original)/original × 100. Positive = an increase, negative = a decrease.
What do the letters stand for, and what units are used?
Change in %, New value, Original value.
How do you calculate change?
Put the values into \% change = (new - original)/original × 100. For example, with New value = 50, Original value = 40, change = 25 %.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (change, new value, original value) and fill in the others: it rearranges the formula for you.
