When we write a text, we should make sure that it is easy to read. However, your opinion is subjective. Flesch–Kincaid readability tests will allow you to have an objective opinion.
I use Flesch–Kincaid readability tests for all my texts before publishing them.
Owing to Rudolf Flesch, we have The Flesch-Kincaid Readability tests. Because he designed to indicate how difficult it is to understand texts.
Hence, the results of the tests correlate roughly inversely. A text that scores comparatively high on the ease of reading test should score lower on the grade level test.
So, below, you will see the formulas for the Flesch-Kincaid Readability test texts in English, Spanish, and German. X is your result.
Flesch–Kincaid test for texts in English
For example, the formula for English texts is
X = 206,835 – 84,6 x WL – 1,015 x SL
SL – average sentence length. You divide the number of words in the text by the number of sentences (to know SL, I use this program).
WL – is the average length of words in syllables. You count the number of syllables in the text and then divide by the number of words. To know the average length of the words in syllables, I use this program.
Flesch–Kincaid test for texts in German
Particularly the formula for German texts is X = 180 – SL – WL x 58,5
SL – average sentence length. The number of words in the text is divided by the number of sentences (to know SL I use this program).
WL – is the average length of words in syllables. First, you count the number of syllables in the text, and after that, you divide by the number of words. To know the average length of the words in syllables, I use this program.
Flesch–Kincaid test for texts in Spanish
Whereas the formula for Spanish texts is
0.39 (total words/total phrases) + 11.8 (total syllables/total words) – 15.59 = X
Therefore, the results are further differentiated in order to be able to make more precise statements about the texts:
90-100: Very easy. Suitable for an 11-year-old.
70-80: Medium easy
60-70: Medium. Suitable for 13 – 15-year-old.
50-60: Medium weight
0-30: Very difficult. Suitable for academics.
All in all, checking your texts for readability before publishing them is a great idea. I do it for my blog posts and blog posts I write for others. As I write in English, Spanish, and German, I am extremely happy to have these formulas. Do you calculate readability of your texts?
Cursos virtuales – revista tips de educación. (n.d.). Retrieved January 28, 2023, from https://tipseducacion.com/archives/category/cursos-virtuales
Flesch reading ease. Flesch Reading Ease – Ryte Digital Marketing Wiki. (n.d.). Retrieved January 27, 2023, from https://en.ryte.com/wiki/Flesch_Reading_Ease
How long is a paragraph? Grammarly. (2020, February 14). Retrieved January 27, 2023, from https://www.grammarly.com/blog/how-long-is-a-paragraph/
Yuncal, A. (2019, June 26). ¿Sabes Qué es en Seo El test Flesch-Kincaid? LinkedIn. Retrieved January 27, 2023, from https://www.linkedin.com/pulse/sabes-qu%C3%A9-es-en-seo-el-test-flesch-kincaid-antonio-yuncal/?originalSubdomain=es