Percent Change Calculator
Percent change shows how much a number went up or down, as a share of where it started. Enter the old value and the new value to see it.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
How it works
Subtract the old value from the new value, divide by the old value, then multiply by 100. A positive answer means the number rose, and a negative answer means it fell.
The old value cannot be zero, because nothing can be divided by zero.
Worked example
Going from 50 to 65 is a change of 30 percent.
Questions
How is percent change different from percentage points?
Percent change compares a new value to the old one as a share of it. Percentage points are simple differences between two percentages, so a move from 10 percent to 12 percent is 2 points but about a 20 percent change.
Can the answer be more than 100 percent?
Yes. If the new value is more than double the old one, the change is over 100 percent.
Why does a 50 percent drop need a 100 percent rise to recover?
Half of the number is gone, so getting back to the start means doubling what is left. The percent is bigger on the way back because the starting base is smaller.
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- Average CalculatorMean of a list of numbers.
- Standard Deviation CalculatorSpread of a list of numbers.
- Weighted Average CalculatorAverage where some values count more.