A complete guide to readability
Readability predicts how much working memory a reader needs to follow you. This guide explains the underlying mechanics — and how to use them without dumbing your prose down.
What readability measures
Readability scores combine sentence length and word complexity to estimate the educational level needed for comfortable first-pass reading. Flesch Reading Ease (0–100) is the most widely cited. Higher is easier.
Why it matters more than vocabulary
Readers don't bounce off hard words — they bounce off compounded cognitive load. A short sentence with a hard word lands. A long sentence with three easy ones can fail.
Targets by audience
General-audience writing thrives between 60 and 75. Professional writing for senior readers sits comfortably from 50 to 65. Below 30 means a specialized audience; above 80 risks reading as juvenile for adults.
The three highest-leverage edits
First, break the longest sentence in every paragraph. Second, replace nominalizations with verbs ('made a decision to' → 'decided to'). Third, lead with the subject and verb instead of stacking subordinate clauses up front.
Put it into practice
Drop a draft into the rewrite engine and watch the principles in this guide applied in real time.
Open the rewrite engineContinue the curriculum
Rhythm
Sentence rhythm: the highest-leverage edit in writing
The body reads rhythm before the mind parses meaning. Healthy rhythm is the foundation that other edits sit on.
Clarity
Clarity is a discipline, not a style
Clarity is the discipline of carrying a precise idea across to a reader without loss. It's a structural quality, not a stylistic one.
Tone
Tone: the layer beneath your words
Tone operates below conscious attention and decides whether your reader leans in or steps back. Here's how to choose it on purpose.