Percentage Difference Calculator

Calculate the percentage difference between two values using their absolute difference and average.

Percentage Difference Formula

Absolute Difference = |Value 1 − Value 2| Average = (Value 1 + Value 2) ÷ 2 Percentage Difference = Absolute Difference ÷ Average × 100

Unlike percentage change, percentage difference does not designate either value as the original or reference value. The average of the two values is used as the reference.

How to Calculate Percentage Difference

1

Enter the Two Values

Enter the two values you want to compare.

2

Find the Absolute Difference

Subtract one value from the other and take the absolute value.

3

Divide by the Average

Use the average of the two values as the reference point.

4

Multiply by 100

The result is the percentage difference.

Percentage Difference vs. Percentage Change

Percentage Difference

Uses the average of the two values. It is useful when neither value is treated as the starting value.

Percentage Change

Uses the original value as the reference point and can show an increase or decrease.

Frequently Asked Questions

Percentage difference is calculated by taking the absolute difference between two values, dividing it by their average, and multiplying by 100.
Percentage difference uses the average of two values as the reference point and is generally used when neither value is treated as the starting value. Percentage change uses the original value as the reference point.
Yes. Percentage difference can be greater than 100% when the two values differ substantially relative to their average.
Percentage difference is undefined when the average of the two values is zero. The calculator will ask you to enter values with a non-zero average.

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