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Readability Score Checker

Score any text against the five most-cited readability formulas — Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, SMOG, the Automated Readability Index (ARI), and Coleman-Liau — so you can match your writing to the audience you actually want to reach. See the averaged grade level, the school-level audience label, and word/sentence/syllable stats at a glance.

工具摘要

此工具接收结构化输入，在浏览器中返回确定性输出，无需上传到服务器。

工具名称
Readability Score Checker
输入意图
提供需要转换、校验或分析的原始内容。
输出意图
获得可直接复制、复用或排错的规范化输出。
示例输入
Plain language is a style of writing that values clarity over cleverness. When you write for general readers, short sentences and familiar words help your message land.
示例输出
Flesch ease: 67.0 (8th-9th grade — plain English) · Average grade: 8.2
Recent inputs0

Your last 5 inputs will appear here.

Flesch Reading Ease
70.17th grade — fairly easy
Average grade level
8.2
HarderEasier
Flesch-Kincaid
5.7grade

U.S. school grade required to read the text on first pass.

Gunning Fog
8.0grade

Years of formal education needed; weights complex (3+ syllable) words.

SMOG
8.8grade

Estimated years of education for full comprehension. Best on 30+ sentence samples.

Automated Readability
7.2grade

ARI uses characters and sentences instead of syllables — useful for short text.

Coleman-Liau
11.0grade

Like ARI, character-based. Good for OCR'd or auto-generated text.

Average of five
8.2grade

Average of all five grade-level formulas. A balanced single number.

Sentences8
Words73
Syllables110
Complex words8
Letters373

工具介绍

Score any text against the five most-cited readability formulas — Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, SMOG, the Automated Readability Index (ARI), and Coleman-Liau — so you can match your writing to the audience you actually want to reach. See the averaged grade level, the school-level audience label, and word/sentence/syllable stats at a glance.

工具概览

Different formulas weight different things — Flesch-Kincaid leans on syllable counts, ARI and Coleman-Liau use character counts, Gunning Fog and SMOG penalize long words. Each gives a slightly different angle on the same draft. Showing all five plus their average makes it easy to spot when your writing is genuinely too dense versus when one formula is over-penalizing a niche style. Everything runs client-side; no draft is uploaded.

使用场景

  • Tune marketing copy to a 6th-9th grade reading level for broad reach
  • Audit technical documentation for accidental jargon density
  • Match academic writing to journal or course expectations
  • Test ESL-friendly content against the Flesch ease score
  • Compare different drafts of the same paragraph side-by-side

输入/输出示例

Short sentences and familiar words land in the 'plain English' band — exactly what most marketing and journalism target.
输入意图
Plain language is a style of writing that values clarity over cleverness. When you write for general readers, short sentences and familiar words help your message land.
输出意图
Flesch ease: 67.0 (8th-9th grade — plain English) · Average grade: 8.2

常见问题

Which score should I trust?+
Look at the average. For most general writing the Flesch Reading Ease is the most intuitive — aim for 60-70 to reach the broad public. For technical writing, the average grade level is the more useful number.
Why do the scores disagree?+
Each formula weights different signals. SMOG penalizes 3+ syllable words heavily, ARI focuses on character counts. A draft full of short technical jargon (like 'SQL', 'API') confuses character-based formulas but Flesch-Kincaid handles it fine.
Is the syllable count exact?+
It's heuristic — like every browser-based readability tool — and accurate within a few percent for English text. Names, acronyms, and very unusual spellings can drift.
Does it work for non-English?+
The formulas were calibrated for English. Spanish, French, German, etc. will still produce numbers, but the grade-level mapping isn't valid. Use it for relative comparisons, not absolute claims.

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