Readability Scorer

How It Works

Paste your text and see readability scores instantly. Aim for Grade 7-9 for most web content.

Paste your content

Works with any text. Articles, landing pages, email copy.

See four readability scores

Flesch-Kincaid, Gunning Fog, Coleman-Liau, and ARI calculated instantly.

Check your grade level

Get an averaged grade level estimate and difficulty rating.

Grade Level

N/A

Difficulty

N/A

Flesch-Kincaid

Gunning Fog

Coleman-Liau

ARI

What do these scores mean?

Flesch-Kincaid — Measures sentence length and syllable count to estimate grade level. Use it to verify your blog posts target the 7th-9th grade sweet spot for web content.

Gunning Fog — Counts complex words (3+ syllables) relative to sentence length. High Fog scores mean you're using jargon that will lose casual readers.

Coleman-Liau — Uses character count instead of syllables for more consistent results across languages. Useful for checking translated or multilingual content.

ARI — Emphasizes characters per word and words per sentence. The most lenient of the four. If ARI says it's hard, it's definitely hard.

Total Words0

Total Sentences0

Total Syllables0

Complex Words (3+ syllables)0

Avg. Sentence Length0

Why Readability Matters for Content Marketing

The Average US Reading Level Is 8th Grade

That single stat shapes everything about how you should write for the web.

The most successful content reads at a 7th to 9th grade level
Plain language keeps readers on page longer and reduces bounce rates
Four readability scores let you cross-reference for accuracy
AI-generated text often skews more complex than what performs well

Four Readability Formulas, One Clear Answer

Each formula measures different aspects of text complexity.

Flesch-Kincaid focuses on syllable count and sentence length
Gunning Fog penalizes complex words with 3+ syllables
Coleman-Liau uses character count for more consistent cross-language results
ARI emphasizes characters per word and sentence length
Averaging all four gives a more reliable grade level than any single score

How Readability Affects SEO and Conversions

Google tracks bounce rate, time on page, and engagement — all influenced by readability.

Grade level above 10? Split long sentences and simplify complex words
Content marketers who check readability before publishing see better engagement
Pair with our word counter to check sentence length stats
Explore AI writing tools with built-in readability optimization