Enter the relative observed agreement among raters and the hypothetical probability of the chance of agreement into the Calculator. The calculator will evaluate the Cohen’s Kappa Coefficient.

- Percent Agreement Calculator
- ICC (Intraclass Correlation) Calculator
- Inter-Rater Reliability Calculator

## Cohen’s Kappa Coefficient Formula

k = (po-pe)/(1-pe)

Variables:

- k is the Cohen’s Kappa Coefficient ()
- po is the relative observed agreement among raters
- pe is the hypothetical probability of the chance of agreement

## How to Calculate Cohen’s Kappa Coefficient?

The following steps outline how to calculate the Cohen’s Kappa Coefficient.

- First, determine the relative observed agreement among raters.
- Next, determine the hypothetical probability of the chance of agreement.
- Next, gather the formula from above = k = (po-pe)/(1-pe).
- Finally, calculate the Cohen’s Kappa Coefficient.
- 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.

relative observed agreement among raters = 0.89

hypothetical probability of the chance of agreement = 0.34