The reading-level framework: match your writing to your audience

There is a persistent belief that harder-to-read writing sounds smarter. It doesn't — it just loses readers faster. On the web, where attention is scarce and competition is one tab away, the text that gets finished is the text that gets read easily.

What a readability score actually measures

The most common readability measure is Flesch Reading Ease, a formula that scores text from 0 to 100 based on sentence length and word length. Shorter sentences and shorter words score higher. A score of 90–100 reads at about a 5th-grade level; a score below 30 reads like a graduate textbook.

The formula is deterministic and transparent: 206.835 minus 1.015 times the average sentence length, minus 84.6 times the average syllables per word. That's all. It is measuring surface features — sentence length and syllable count — not comprehension, not insight, and not intelligence.

Match the level to the reader and the moment

The right reading level depends on context. A technical specification for engineers can score low and still be exactly right for its audience. A marketing page for a general audience should score high, because the reader is deciding quickly and will not re-read a dense sentence.

• General web content and marketing: aim for a 7th–9th grade reading level (Flesch 60–70).
• B2B and professional writing: 9th–12th grade is fine when the reader already knows the domain.
• Technical documentation: let the score fall where it needs to — clarity still matters, but precision matters more.
• Email and product UI: go lower. Short words, short sentences, one idea per line.

Lower the level without dumbing it down

Improving readability is not the same as making the writing simple-minded. The three highest-leverage moves are mechanical.

1. Shorten sentences. Split anything over 25 words. One idea per sentence is not a style preference; it's a reading aid.
2. Prefer common words. "Use" instead of "utilize," "help" instead of "facilitate." The meaning is the same; the friction is lower.
3. Cut filler. "In order to," "it is important to note that," and adverbs like "very" and "really" add length and no information.

Use the score as a compass, not a verdict

A readability score will not tell you whether your argument is sound or your headline is compelling. But it will reliably flag the text that your reader is quietly skimming instead of reading. Fix the mechanics, and the score improves on its own — and so does the writing.