EFLAW（English as a Foreign Language）スコア。Rachel McAlpine がESL読者やグローバル読者向けに開発。低いほど読みやすい。
日本語 向けではありません
このツールは英語（および関連言語）向けに調整されています。日本語 の結果は意味をなさない可能性があります。
Use McAlpine EFLAW when writing for non-native English readers — product copy for global audiences, ESL teaching material, simplified news, plain-language guidelines. It rewards short common words, which is exactly what ESL readers need.
EFLAW is unique in rewarding short common words ("the", "and", "of"). Flesch-Kincaid ignores word familiarity entirely. For ESL audiences, EFLAW is the more honest metric.
McAlpine's EFLAW (English as a Foreign Language) score uses one simple formula: (words + mini-words) / sentences, where mini-words have 3 or fewer letters.
It rewards short common words (the, of, an, to, it) — exactly the words ESL readers find easiest.
Bands: ≤20 very easy, 20-24 easy, 25-28 moderate, 29+ difficult. Aim for ≤25 for global business audiences.
Writers targeting non-native English readers — global product copy, ESL teaching material, simplified news, plain-language guidelines.
Under 25 for global business audiences. Under 20 is very easy and suitable for ESL beginners.
Common short words (the, of, an, to, it) are what ESL readers find easiest. Counting them gives the formula a way to reward genuinely simple writing.
入力
"To get to the shop, walk down the road and turn right at the end."
出力
EFLAW 17.0 — very easy.
Fifteen words plus eight mini-words (≤3 letters) in one sentence: (15 + 8) / 1 = 23. Wait — that's 23 which is "easy" not "very easy". For very easy, aim under 20.