What Is a Readability Score?
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Key Takeaways
- A readability score converts sentence length and syllable count into a single number estimating reading ease.
- The Flesch Reading Ease scale runs 0–100: 60–69 is 'standard' plain English, 90–100 is very easy, and below 30 is very difficult.
- The formula rewards shorter sentences and shorter words — both native to how people read a fast-moving feed.
- Flesch Reading Ease was published by Rudolf Flesch in 1948; the related Flesch–Kincaid Grade Level was derived for the U.S. Navy in 1975.
- LinkedIn has no readability setting: a readability score is a pre-publish writing check, not a platform metric.
How a Readability Score Works
A readability score is a single number that estimates how hard a passage is to read. Rather than judging style, the formulas behind these scores measure two mechanical things: how long your sentences are, and how long your words are. Short sentences and short words produce an easier score; long, clause-heavy sentences and multi-syllable words produce a harder one. The output is a proxy for cognitive effort — roughly, how much work a reader has to do to follow you.
Dozens of readability formulas exist, but one dominates: the Flesch Reading Ease score, published by the readability researcher Rudolf Flesch in 1948.[1]Flesch, R. (1948). "A new readability yardstick." Journal of Applied Psychology, 32(3), 221–233. View source Its companion, the Flesch–Kincaid Grade Level, was derived for the U.S. Navy in 1975 to estimate the school grade needed to understand a text.[2]Kincaid, J.P., Fishburne, R.P., Rogers, R.L. & Chissom, B.S. (1975). "Derivation of New Readability Formulas for Navy Enlisted Personnel." Research Branch Report 8-75, U.S. Naval Air Station, Memphis. View source Both are built into word processors and writing tools, which is why "readability score" almost always means one of the two.
LinkedIn has no readability setting. A readability score is a check you run before you publish, not a metric the platform reports. But it maps closely to how the feed is actually read: on a phone, at speed, between other tasks. A post that scores as "easy" survives that environment; a dense one loses readers before the hook even pays off, which shortens dwell time and caps reach.
The Flesch Reading Ease Formula
Flesch Reading Ease is calculated from average sentence length and average syllables per word:
206.835 − 1.015 × (total words ÷ total sentences) − 84.6 × (total syllables ÷ total words)
The result lands on a 0–100 scale where higher is easier. The standard bands:[1]Flesch, R. (1948). "A new readability yardstick." Journal of Applied Psychology, 32(3), 221–233. View source
| Score | Reading ease |
|---|---|
| 90–100 | Very easy — understood by an average 11-year-old |
| 70–89 | Easy to fairly easy |
| 60–69 | Standard — plain English |
| 30–59 | Difficult — college level |
| 0–29 | Very difficult — dense, specialist prose |
For LinkedIn, aim for 60 or higher. That is not "dumbing down" — it is removing friction so a busy reader keeps going. Formats built for the feed tend to score high by design: the broetry style and the listicle post both use short lines and short words, exactly what the formula rewards.
Example of a Readability Score
Say a sentence runs 20 words at an average of 1.5 syllables per word — the dense corporate register of "leverage synergistic methodologies to facilitate transformational outcomes." Plug in: 206.835 − (1.015 × 20) − (84.6 × 1.5) = 206.835 − 20.3 − 126.9 = 39.6, which lands in "difficult." Now rewrite the same idea as a plain 8-word line — "we help teams get better results" — at roughly 1.4 syllables per word: 206.835 − (1.015 × 8) − (84.6 × 1.4) = 206.835 − 8.12 − 118.4 = 80.3, or "easy." Same meaning, less than half the reading effort, and far friendlier to someone thumbing through the feed.
The Bottom Line
A readability score turns sentence length and word complexity into one number that estimates how easy your writing is to read, most often on the 0–100 Flesch Reading Ease scale. For LinkedIn, a score of 60 or above keeps a post scannable for someone reading fast on a phone. It is not a style grade and not a platform metric — just a quick, mechanical check that the friction is low. Pair it with tight line break formatting inside the 3,000-character limit, and more of the people who started reading will finish.
What people get wrong about readability scores
A readability score is a smoke detector, not a chef. It tells you the room is filling with friction; it cannot tell you the writing is good. You can score a perfect 100 and say absolutely nothing — short, simple, empty. Writers who chase the number start hacking sentences into fragments and stripping out every precise word, and end up with prose that reads easy and lands flat. Use the score to catch the wall-of-text paragraph and the 40-word sentence, then ignore it. Clarity is the goal; the score is just one crude instrument that occasionally notices when you've lost it.
| Readability Score | Line Break Formatting | |
|---|---|---|
| What it does | Scores reading difficulty from word and sentence length | Adds white space and short lines to a post |
| Output | A number (e.g., 0–100 Flesch) | A visual layout |
| Fixes | Sentences that are too long or too complex | Text that looks like an intimidating wall |
| Where it lives | In a writing tool, before publishing | In the post itself |
Frequently Asked Questions
- What is a good readability score for LinkedIn?
- Aim for a Flesch Reading Ease of 60 or higher — plain, standard English. The feed is read fast on phones, so easy-reading text holds attention longer than dense, jargon-heavy prose, whatever the topic.
- What is the Flesch Reading Ease formula?
- 206.835 minus 1.015 times the average words per sentence, minus 84.6 times the average syllables per word. Shorter sentences and shorter words raise the score; long, complex ones lower it.
- Is a higher readability score always better?
- No. A very high score can mean clear writing or empty writing. The score flags friction — long sentences, hard words — but it can't judge whether you actually said something. Use it as a check, not a target.
- Does LinkedIn show a readability score?
- No. LinkedIn does not calculate or display one. Readability is measured by outside writing tools before you post; the platform only reports engagement metrics like impressions and reactions.
Article Sources
ContentIn requires writers to use primary sources — official LinkedIn documentation, engineering publications, and original platform data. Learn more in our editorial standards.
- Flesch, R. (1948). "A new readability yardstick." Journal of Applied Psychology, 32(3), 221–233.Link Accessed July 22, 2026.↩
- Kincaid, J.P., Fishburne, R.P., Rogers, R.L. & Chissom, B.S. (1975). "Derivation of New Readability Formulas for Navy Enlisted Personnel." Research Branch Report 8-75, U.S. Naval Air Station, Memphis.Link Accessed July 22, 2026.↩