Enter the post-improvement performance measure and the baseline or pre-improvement performance measure into the calculator to determine the Improvement Index. This calculator can also evaluate any of the variables given the others are known.

## Improvement Index Formula

The following formula is used to calculate the Improvement Index.

II = (PI - BI) / BI * 100

Variables:

- II is the Improvement Index (%)
- PI is the post-improvement performance measure
- BI is the baseline or pre-improvement performance measure

To calculate the Improvement Index, subtract the baseline or pre-improvement performance measure from the post-improvement performance measure. Divide the result by the baseline or pre-improvement performance measure. Multiply the quotient by 100 to convert it to a percentage. The Improvement Index represents the percentage change in performance due to improvements.

## What is an Improvement Index?

An Improvement Index is a statistical measure used to quantify the potential improvement that could be achieved if a particular intervention or change is implemented. It is often used in fields such as healthcare, education, and business to assess the effectiveness of various strategies or interventions. The index is typically expressed as a percentage, with higher percentages indicating greater potential for improvement.