Spache 可读性公式根据小学常用词列表评分。专为 K-4 阅读材料设计。
未针对 简体中文 设计
该工具针对英语（和一些相近语言）校准。简体中文 的结果可能不准确。
Use Spache for any text aimed at K-4 readers — primary readers, beginning ESL, picture books, learn-to-read content. It's the formula educators most often request for grade 4 and below.
Spache and Dale-Chall both use familiar-words lists, but Spache targets younger readers (K-4) and Dale-Chall targets grades 4+. Use Spache for primary, Dale-Chall for everything else.
The Spache Readability Formula was developed in 1953 specifically for primary-grade text (K-4).
It scores against a list of approximately 1,000 words familiar to elementary readers, combined with sentence length: grade = 0.121 × avg sentence length + 0.082 × % unfamiliar + 0.659.
Best used to evaluate beginning readers, picture books, and ESL primary material. Above grade 4, switch to Dale-Chall.
Spache for K-4 reading material. Dale-Chall for grade 4+. They use different familiar-words lists.
The Spache list dates to 1953 — modern children's vocabulary may not match. Suffix stripping helps but isn't perfect.
Grade 1-2 for early readers, 3-4 for primary independent reading. Above grade 4, use a different formula.
输入
"The dog ran fast across the green field."
输出
Spache grade 1.4 — primary.
All eight words are in the Spache familiar-words list and the sentence is short. Suitable for grade 1–2 readers.