How to Improve Your Readability Score

How to Improve Your Readability Score: Practical Tips

You have a draft that scores at grade 12, and your audience is a general consumer base. The fix is not mysterious: shorter sentences, simpler words, and clear structure move the needle faster than any other editing technique. This guide walks through each technique in priority order.

Sentence length: the highest-impact change for your readability score

Sentence length is the fastest lever for lowering your Flesch-Kincaid grade level or raising your Reading Ease score. Both formulas weight average sentence length heavily in their calculations: each additional word per sentence raises FK Grade Level by approximately 0.39 points. A text averaging 30 words per sentence scores roughly 5.8 grade levels higher than the same text restructured to average 15 words per sentence with no other changes. Identifying and splitting your longest sentences produces the largest per-edit improvement of any rewriting technique.¹

A practical threshold for flagging problem sentences is 30 words. Sentences over 30 words almost always contain embedded clauses, qualifications, or multiple ideas that read more clearly as separate statements. When you find a sentence over 30 words, locate the main verb and subject, extract that as a standalone statement, then build a second sentence from the subordinate idea. This split rarely loses meaning and frequently improves clarity beyond what the score improvement alone captures.²

Identifying long sentences without manually counting words

Paste your text into a readability tool and check the average sentence length figure in the analysis output. Most tools also flag outlier sentences above a configurable threshold. If your tool does not show individual sentence lengths, a word processor's Find function can help: search for periods followed by a capital letter to locate sentence endings, then read backward to find the sentence start. Sentences wrapping onto two or more lines in a standard-width text editor are strong candidates for splitting.

Replacing polysyllabic words without losing precision

Word syllable count is the second major input in both readability formulas, and reducing your average syllables per word raises your Reading Ease score even when sentence length stays constant. Every polysyllabic word you replace with a shorter equivalent contributes a small improvement; replacing multiple words per paragraph accumulates meaningfully across a full article. The target is not to eliminate all long words but to replace those that add syllables without adding precision.

Two categories of polysyllabic words respond well to substitution: connective tissue words and formal alternatives to common concepts. "Utilize" is three syllables where "use" is one, and they mean the same thing in almost every context. At five syllables, "approximately" can almost always become "about." Substitutions like these lose nothing and reduce syllable density without requiring you to sacrifice technical accuracy anywhere in the document.³

Domain vocabulary vs. connective tissue words

Connective tissue words are verbs, adverbs, and prepositions that link ideas together without carrying the core meaning of the sentence. These are the safest substitution targets because they are invisible to domain experts but count equally in syllable totals. Domain vocabulary must stay precise: replacing "myocardial infarction" with "heart attack" is appropriate for patient-facing content but not for a cardiology reference. Audit your text for connective tissue words first; leave technical terminology alone unless your audience does not require it.

Structural formatting, paragraph-level readability, and a revision workflow

Subheadings, short paragraphs, and lists do not directly change Flesch-Kincaid scores because the formula only reads sentence length and syllable count. However, they have a strong measurable effect on reader behavior that is just as important as the formula score. Users scanning a page with clear subheadings every 2–3 paragraphs engage more deeply with each section because they can predict the content structure before reading. Pages with subheadings consistently show longer session durations compared to the same content published as unbroken prose.⁴

Paragraph length affects cognitive load independently of sentence length. A paragraph of four short sentences is easier to re-read if you lose your place than a paragraph of two long sentences, because you have more clear stopping points. Keeping each paragraph to 3–4 sentences also creates visual space in the text, which reduces the wall-of-text perception that causes readers to skim rather than read. A text can score at grade 7 and still feel difficult if paragraphs are long and subheadings are absent, while content scoring at grade 10 can feel approachable when headers signal topic shifts between dense passages.

Setting a target score and working through a revision pass

Before revising, run the text through a readability tool to establish a baseline score and note the average sentence length. Setting a target before you edit prevents over-revision and under-revision. For most general web content, a Flesch Reading Ease of 60 or above, or a Flesch-Kincaid Grade Level of 8 or below, is a reasonable destination. Work through the text paragraph by paragraph: identify the longest sentence first, split it, then scan for polysyllabic connective words and replace them with shorter equivalents. After revising every paragraph, re-run the tool and compare the new score to your baseline.

Your target should match your audience, not an arbitrary ideal. A landing page for a direct-to-consumer product should target Flesch-Kincaid Grade 6–7, while technical release notes for software developers can stay at grade 9–10 without losing the audience. Setting the right target before you start prevents you from over-simplifying specialized content or under-simplifying general content. Most texts reach the target range within two passes when this sequence is followed.⁵

When to use this

Use these techniques when rewriting content to improve its readability score, then watch the reading grade fall with each edit to confirm the improvement.

Examples

The implementation of the aforementioned methodology was conducted by our team in order to facilitate the optimization of operational efficiency across all departments within the organization.

Our team used the new method to help every department work more efficiently. We ran a four-week test across all teams and cut average task time by 18% while maintaining output quality.

A comprehensive enumeration of readability improvements would encompass numerous categories of textual modification.

9 quick wins:
1. Cut average sentence length to 15–20 words.
2. Replace jargon with plain alternatives.
3. Use bullet points for lists of 3+ items.
4. Write in active voice.
5. Add subheadings every 2–3 paragraphs.
6. Use "you" and "your" to speak directly to the reader.
7. Bold key terms on first use.
8. Keep paragraphs under 4 sentences.
9. Read your text aloud to catch awkward phrasing.