CalcKit

Percentage Change Calculator

Measure the percentage increase or decrease between two values.

Enter your values

The starting value; it cannot be zero.

The ending value to compare.

Result

Percentage change25.00%
Absolute change
25
Original value
100
New value
125

A positive result means the new value is numerically higher. For negative starting values, this tool divides by the absolute original value to preserve that direction.

Calculated in your browser. Share links include the values you choose to share.

Formula

Percentage change (%) = (New value − Original value) ÷ |Original value| × 100

Worked example

A value increases from 100 to 125.

The absolute increase is 25 and the percentage increase is 25.00%.

How to use

  1. Enter the original nonzero value.
  2. Enter the new value.
  3. Calculate the signed change; negative starting values use the absolute denominator convention.

Related calculators

PercentageFind a percentage of any number, from small amounts to large totals.Revenue GrowthCompare revenue across two periods and measure growth.ROIMeasure your net gain as a percentage of your investment.

Frequently asked questions

What if the original value is negative?

There is no universally appropriate percentage-growth interpretation for negative baselines. This tool uses the absolute original value, so −100 to −50 reports +50%. State this convention when sharing.

What is the difference between percentage points and percent change?

Moving from 10% to 15% is 5 percentage points, but a 50% relative increase. Enter 10 and 15 here to find the relative increase.