Percentage Change Calculator
Find the percentage increase or decrease between an old and a new value — useful for prices, stats, salaries and growth tracking.
Change
+20
Percentage
+25% increase
Formula
change% = ((new − old) ÷ |old|) × 100How to use the Percentage Change Calculator
- 1Enter the original (old) value
- 2Enter the new value
- 3The calculator shows increase or decrease in percent
Frequently Asked Questions
How do I calculate percentage increase?
Subtract the old value from the new value, divide by the old value and multiply by 100. Example: from 80 to 100 is a 25% increase.
What is the difference between percentage change and percentage difference?
Percentage change uses one value as the base (old → new). Percentage difference compares two values using their average as the base.