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Calculate percentage increase, decrease, difference, and relative change between two values.
Percentage Change/Difference Calculator is loading — interactive editor will appear here. Use examples below to try instantly once loaded.
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Calculates percentage increase, decrease, difference, and relative change between two values. Enter an initial value and a final value to see the absolute change, percentage change, direction (increase/decrease), and ratio.
Percentage change calculations are fundamental in finance, science, engineering, and everyday life. This tool provides an instant, accurate answer without manual arithmetic errors.
This tool is part of the DevStackIO platform — a collection of free online developer tools from DevStackIO. Browse more free developer resources on DevStackIO.
Students, analysts, finance professionals, scientists, and anyone comparing before/after values — sales growth, population change, price differences, experimental results.
Enter the initial (starting) value in the first field
Enter the final (ending) value in the second field
The tool instantly shows absolute change, % change, direction, and ratio
100, 12050, 40200, 250What if the initial value is zero?
Percentage change is undefined (infinite). The tool shows ∞.
What's the difference between percentage change and percentage difference?
Change uses initial as base; difference uses the average of both values.
Can I calculate compound annual growth rate (CAGR)?
Use the CAGR Calculator for multi-period growth rates.
Authoritative specifications, standards, and in-depth reading for Percentage Change/Difference Calculator.
Absolute Change
+20
% Change
+20%
Direction
increase
Ratio (Final/Initial)
1.2
Formula: (Final − Initial) / |Initial| × 100%
Runs locally. Division by zero returns ∞.
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