What Is the Automated Readability Index?

The Automated Readability Index (ARI) is another readability test for text in the English language to measure the readability of your content.

Similar to the Flesch–Kincaid readability test or most other readability tests, the ARI formula calculates a readability score. However, this methodology is based on the average number of characters per word and the average number of words per sentence instead.

What Is the ARI Readability Calculator?

This online tool uses the automated readability index formula to calculate the readability of a text. To use the ARI readability calculator, simply paste all your content into the input above.

How to Calculate the Automated Readability Index Score

The readability formula for calculating the ARI score uses number of characters, number of words, and number of sentences.

4.71 × (characters ÷ words) + 0.5 × (words ÷ sentences) - 21.43

This formula to measure readability shows that the higher ARI scores indicate that the text is more challenging to read.

Here are the interpreted ARI readability scores:

How Can You Increase Your ARI Score?

To increase your ARI score, you should aim to use shorter words and sentences. Reducing the average number of characters per word and keeping sentences shorter will help make your text more readable.