Percentage Change Calculator
Enter the old and new values to calculate the percentage increase or decrease.
How it runsThis calculation or text operation runs in your browser.
What the result means
The percentage change compares the new value with the original value. Positive means the new value is higher; negative means it is lower.
Important note
When the original value is zero, percentage change is undefined. Negative starting values can also require additional context.
About this tool
Calculate percentage increase or decrease between an old value and a new value with this free online calculator.
Many browser-based tools process input on your device; external-service tools may send network requests.
How to use
Use the fields above
Enter the old and new values to calculate the percentage increase or decrease.
No signup
Many tools run locally in your browser.