José Antonio García López adapted the Flesch Readability Formula to determine the minimum age needed to understand Spanish text. The formula is:

• Age: Age needed to understand the text.
• P: average number of words per phrase.
• S: average number of syllables per word.

Here's how it works:

• It takes the average number of words in a sentence and the average number of syllables in a word.
• Then, it uses these numbers in a simple math equation to output the minimum age.

This formula is useful to ensure that Spanish readers can read and understand important documents.