📚 Writing Guide

Readability Scores Explained

What Flesch-Kincaid, Gunning Fog, and other scores actually mean

What Is Readability?

Readability measures how easy your writing is to understand. It doesn't measure quality, accuracy, or persuasiveness — only the cognitive effort required to parse your sentences. High readability means your audience can focus on your ideas rather than struggling with your prose.

Most readability formulas use two variables: sentence length (longer sentences are harder to follow) and word complexity (measured by syllable count or word length). Different formulas weight these factors differently, but they all point in the same direction.

Common Readability Formulas

Flesch Reading Ease (FRE)

The most widely used readability score. Ranges from 0 (extremely difficult) to 100 (very easy). Based on average sentence length and average syllables per word.

Score	Difficulty	Grade Level	Typical For
90–100	Very Easy	5th grade	Comics, children's books
80–89	Easy	6th grade	Conversational English
70–79	Fairly Easy	7th grade	Consumer magazines
60–69	Standard	8th–9th grade	Most journalism, web content
50–59	Fairly Difficult	10th–12th grade	Academic, professional writing
30–49	Difficult	College level	Academic journals, legal documents
0–29	Very Difficult	Graduate level	Scientific papers, legislation

Target for web content: 60–70. This is the range most successful blogs, news sites, and marketing copy fall in. It doesn't mean dumbing down — it means writing clearly.

Flesch-Kincaid Grade Level

Converts the Flesch score into a US school grade level. A score of 8.0 means an average 8th grader can understand the text. Most popular writing targets grade 7–9. The Wall Street Journal averages grade 11. Academic papers often score grade 14+.

Gunning Fog Index

Estimates the years of formal education needed to understand text on first reading. Uses sentence length and percentage of "complex words" (3+ syllables). A score of 12 means 12 years of education (high school graduate). Most newspapers target 9–12. Business writing should aim for 8–12.

Coleman-Liau Index

Unique in that it uses character count instead of syllable count, making it faster to compute and consistent across languages. Like Flesch-Kincaid, it outputs a US grade level. Generally correlates well with other readability measures.

How to Improve Your Readability Score

Shorten sentences. Average sentence length of 15–20 words is ideal. Mix short punchy sentences with occasional longer ones for rhythm.
Use simpler words. "Use" instead of "utilize." "Help" instead of "facilitate." "Start" instead of "commence." Shorter words aren't less intelligent — they're more accessible.
Break up paragraphs. Web readers scan. Keep paragraphs to 2–4 sentences. One-sentence paragraphs are fine for emphasis.
Use subheadings. Break long content into sections. Readers should be able to understand your structure from the headings alone.
Write in active voice. "The team completed the project" is clearer than "The project was completed by the team."
Read aloud. If you stumble while reading your own work aloud, your readers will stumble too. Use our readability analyzer to score your writing instantly.

Frequently Asked Questions

What is a good Flesch Reading Ease score?

For web content and general audience writing, aim for 60–70 (standard difficulty, 8th–9th grade level). For academic writing, 30–50 is typical and acceptable. For children's content, target 80+. Most successful blogs and news sites score in the 60–70 range.

What grade level should I write at?

For maximum reach, write at a 7th–9th grade level (Flesch-Kincaid Grade 7–9). This isn't about simplifying ideas — it's about expressing complex ideas in accessible language. The New York Times writes at roughly an 8th grade level.

Do readability scores affect SEO?

Not directly — Google doesn't use readability scores as a ranking factor. However, readable content tends to have better engagement metrics (lower bounce rate, higher time on page), which do indirectly affect rankings. More importantly, readable content serves your audience better.

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