Percentage Change Calculator
Calculate the percentage increase or decrease between an old and a new value.
Processed in your browser. Nothing you enter is uploaded.
Change = (new − old) ÷ |old| × 100. A positive result is an increase, a negative result a decrease.
How to use it
- Enter the old value and the new value.
- Read the percentage change and whether it is an increase or decrease.
- Check the formula and the absolute change.
- Copy the result.
Example
- An increase
- Input:From 50 to 75
- Result:+50% (increase)
What does Percentage Change Calculator do?
Percentage Change Calculator shows how much a value rose or fell, as a percentage of the old value.
How does Percentage Change Calculator work?
It computes (new − old) ÷ |old| × 100 and checks the result is finite. The calculation runs in your browser.
Is my data uploaded?
No. The numbers you enter stay in your browser.
Which formats and inputs does Percentage Change Calculator support?
Inputs: An old value and a new value, with commas or decimals allowed. Output: The percentage change with its direction, the formula and the absolute change.
What are the limits and limitations of Percentage Change Calculator?
Limits: old value cannot be zero. Change is measured against the absolute value of the old number, so negative bases are handled consistently.
More questions
How is percentage change calculated?
(new - old) / |old| x 100. A positive result is an increase and a negative result is a decrease.
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