Interrater Reliability Calculator


Calculating interrater reliability is crucial in various fields to ensure consistency and accuracy in data interpretation. An effective way to achieve this is by employing an Interrater Reliability Calculator. This article will guide you through creating a functional calculator using HTML and JavaScript, allowing you to streamline the reliability assessment process.

How to Use

To use the Interrater Reliability Calculator, follow these simple steps:

  1. Input the number of raters and the total number of ratings into the designated fields.
  2. Click the “Calculate” button to initiate the calculation.
  3. The result will be displayed, indicating the interrater reliability coefficient.


The interrater reliability coefficient (ICC) is calculated using the following formula:


  • is the mean square between raters.
  • is the mean square within raters.
  • is the number of raters.


Suppose you have 3 raters and 30 ratings. After entering these values into the calculator, the ICC is calculated as follows:


Q1: What does the interrater reliability coefficient signify?

A1: The ICC quantifies the degree of agreement or consistency among multiple raters, ranging from 0 (no reliability) to 1 (perfect reliability).

Q2: Can the Interrater Reliability Calculator handle different types of ratings?

A2: Yes, the calculator is versatile and can be used for various rating scenarios.


Incorporating an Interrater Reliability Calculator into your assessment processes enhances the accuracy and reliability of data interpretation. By following the steps outlined in this article, you can easily calculate the interrater reliability coefficient and make informed decisions based on consistent data.


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