The Journal

Readability

Readability, explained: what the score actually measures

A readability score isn't a verdict on your writing — it's a measurement of how much working memory a reader needs to follow you. That distinction changes how you should respond to it.

6 min read · Updated 2025-03-14 · The RewriteAIForMe Editors

What the score is measuring

Flesch Reading Ease combines two things: how long your sentences are, and how many syllables your words contain. Long sentences and polysyllabic words tax working memory. The score predicts the educational level needed to read your prose comfortably on first pass.

Why 'easy to read' isn't 'dumbed down'

Some of the most sophisticated writers — Orwell, Didion, Atul Gawande — score in the 'plain English' range. Clarity is not the opposite of intelligence. It is the discipline of carrying intelligence across to a reader.

When to ignore the score

Technical documentation, legal text, and academic writing have audiences who expect higher cognitive load. A 30 score is appropriate for a contract. A 30 score on a homepage is a failure of empathy.

The single most effective fix

Find your longest sentence in any document. Break it into two. Then look for a sentence built around a nominalization — a verb that's been turned into a noun ('the implementation of,' 'a consideration of') — and rewrite it with the verb back where it belongs.

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