**About Inter-rater Reliability Calculator (Formula)**

Inter-rater reliability is a measure of how much agreement there is between two or more raters who are scoring or rating the same set of items. The Inter-rater Reliability Calculator formula is used to calculate the percentage of agreement between the raters.

**Formula:**

**IRR = (TA / (TR * R)) * 100**

**Where:**

- IRR is the inter-rater reliability (%)
- TA is the total number of agreements in the ratings
- TR is the total number of ratings given by each rater
- R is the number of raters

The Inter-rater Reliability Calculator calculates the inter-rater reliability percentage based on the number of agreements among the raters, the total number of ratings given by each rater, and the number of raters.

In order to use this formula, the total number of agreements, the total number of ratings given by each rater, and the number of raters must be entered as inputs. Once the inputs are entered into the formula, the result is displayed as the inter-rater reliability percentage.

To determine the consistency of ratings or scores assigned by different raters in fields such as education, psychology, and healthcare, the Inter-rater Reliability Calculator is frequently used. In order to be able to make important decisions, the results of assessments or evaluations must be reliable.