Percentage Change Calculator
Find the percentage increase or decrease between two numbers, plus the absolute difference, instantly in your browser.
Percentage change
+25%
Increase
Absolute difference
20
Direction
Increase
Enter a starting value and an ending value to see the exact percentage change between them. The calculator runs entirely in your browser, so your numbers never leave your device.
How to use
- Enter the original (from) value.
- Enter the new (to) value.
- Read the percentage change, direction, and absolute difference instantly.
Frequently asked questions
- How is percentage change calculated?
- It's ((new value − old value) / |old value|) × 100, expressed as a percentage.
- What does a negative result mean?
- A negative percentage means the value decreased from the original to the new number.
- What happens if the starting value is zero?
- Percentage change is undefined when the starting value is zero, so the result shows 0% to avoid a division error.