For general web content, a good readability score is a Flesch Reading Ease of 60 to 70, which maps to a Flesch-Kincaid grade level of about 7 to 9. That range reads clearly for most adults without feeling dumbed down. The right target depends on your audience: write to the reading level they expect, not to a universal number.
Readability formulas estimate how hard text is to read by combining sentence length and word complexity. They do not judge whether your writing is good, only how much effort it takes to parse. That makes them a useful editing signal, not a grade on quality.
What a Flesch Reading Ease score means
Flesch Reading Ease runs from 0 to 100. Higher is easier. The bands:
| Score | Difficulty | Reading level |
|---|---|---|
| 90 to 100 | Very easy | 5th grade |
| 80 to 90 | Easy | 6th grade |
| 70 to 80 | Fairly easy | 7th grade |
| 60 to 70 | Plain English | 8th to 9th grade |
| 50 to 60 | Fairly difficult | 10th to 12th grade |
| 30 to 50 | Difficult | College |
| 0 to 30 | Very difficult | College graduate |
Most general-audience web writing should land in the 60 to 70 band. News sites often aim higher, around 70 to 80, to reach the widest audience.
The six common readability formulas
Different formulas weight sentence length and word complexity differently, so it helps to read several at once rather than trusting one.
| Formula | Output | What it emphasizes |
|---|---|---|
| Flesch Reading Ease | 0 to 100 score | Sentence length and syllables per word |
| Flesch-Kincaid Grade Level | US grade | Same inputs, expressed as a grade |
| Gunning Fog Index | Years of schooling | Sentence length and "complex" words |
| SMOG Index | Years of schooling | Polysyllabic words, tuned for health content |
| Coleman-Liau Index | US grade | Characters per word, not syllables |
| Automated Readability Index | US grade | Characters per word and sentence length |
When the formulas roughly agree, you can trust the reading level. When they diverge sharply, your text probably mixes very short and very long sentences, which is worth a second look.
Match the score to your audience
There is no single correct grade level. Hemingway's fiction scores around grade 4. Scientific journals run grade 14 to 18 because the audience expects precision over ease. The goal is to match the reader: general public around grade 7 to 9, professional audiences higher, children lower.
How to lower your grade level fast
If a draft reads above your target, three edits drop the score quickly:
- Shorten sentences. Long sentences are the single biggest driver of high grade level. Aim for an average of 15 to 20 words per sentence for general audiences.
- Swap polysyllabic words. "Utilize" becomes "use", "demonstrate" becomes "show", "sufficient" becomes "enough". Each swap lowers the syllable density.
- Break compound thoughts. A sentence with three clauses becomes three sentences with one clause each. Easier to parse, lower grade level.
Check your own text
Paste any text into our readability score checker to get all six formulas and a grade level at once, so you can see whether they agree before you publish. Pair it with the keyword density checker to confirm your topic terms are present without keyword stuffing, and the meta tag generator for the title and description. For the full set, browse all our SEO tools.