Percentage Increase Calculator
Find the percentage increase between two numbers.
What would you like to do next?
Calculate a percentage increase
Enter the original value and the new value above to find the percentage increase between them, along with the raw difference. The increase is the change divided by the original amount, expressed as a percent. This is useful for price rises, growth in followers or sales, and any before-and-after comparison. The calculation runs in your browser.
The formula
Percentage increase equals the new value minus the original value, divided by the original value, multiplied by 100.
How percentage increase is calculated
The result compares the change with the magnitude of the original value, then reports the difference separately.
Method
Subtract the original value from the new value, divide by the absolute original value, and multiply by 100.
percentage change = (new - original) / abs(original) x 100
Worked example
From 80 to 92, the difference is 12. Dividing 12 by 80 gives 0.15, so the increase is 15%.
Limits
- An original value of zero has no defined percentage change, so the tool does not return a result.
- A negative original value can make the everyday meaning of increase or decrease ambiguous.
- The display rounds the final result; keep unrounded values for chained calculations.
Reviewed against the current calculator or processor on September 6, 2026.
Frequently asked questions
How do you calculate percentage increase?
Subtract the original value from the new value, divide by the original value, then multiply by 100 to get the percent increase.
What if the new value is lower?
Then the result is negative, which means the value actually decreased rather than increased.