Enter the probability of agreement and the probability of random agreement into the Calculator. The calculator will evaluate the Kappa Index.

## Kappa Index Formula

KI = (P0-Pe)/ (1-Pe)

Variables:

- KI is the Kappa Index ()
- P0 is the probability of agreement
- Pe is the probability of random agreement

To calculate Kappa Index, subtract the probability of random agreement from the probability of agreement, then divide the result by the result of 1 minus the probability of random agreement.

## How to Calculate Kappa Index?

The following steps outline how to calculate the Kappa Index.

- First, determine the probability of agreement.
- Next, determine the probability of random agreement.
- Next, gather the formula from above = KI = (P0-Pe)/ (1-Pe).
- Finally, calculate the Kappa Index.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

probability of agreement = 40

probability of random agreement = 250