Percentage Change Calculator
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Quickly calculate percentage change between two values — whether it's an increase or decrease. Simple, fast, and accurate.
Quickly calculate percentage change between two values — whether it's an increase or decrease. Simple, fast, and accurate.
Percentage change measures how much a value has increased or decreased relative to its original value. Unlike percentage increase or decrease calculators, this tool handles both directions — it will tell you whether the change is positive (an increase) or negative (a decrease), making it the most versatile percentage calculator for everyday use.
Follow these steps:
Formula:
(New − Original) ÷ Original × 100
A positive result means an increase; a negative result means a decrease.
Example 1 — Increase
Change from 100 to 120 = +20%
Example 2 — Decrease
Change from 80 to 60 = −25%
Example 3 — Increase
Change from 50 to 75 = +50%
What is the difference between percentage change and percentage difference?
Percentage change compares a new value to an original value and shows direction (+ or −).
Percentage difference compares two values without implying a starting point, using the average of the two as the base.
Can percentage change be negative?
Yes. A negative result means the value decreased. A positive result means it increased.
What if the original value is zero?
Percentage change is undefined when the original value is zero, since division by zero is not possible.
Why is percentage change useful?
It lets you compare how much something has changed relative to its starting point,
regardless of the scale of the numbers involved.