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FORCAST Readability Calculator

FORCAST is designed for technical text such as forms and instructions. It uses single‑syllable word counts.

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FORCAST was developed in 1973 by Caylor, Sticht, Fox, and Ford specifically for technical, non-narrative writing (forms, manuals, instructions).

It uses a 150-word sample and counts single-syllable words: 20 − (single-syllable words / 10).

It does not require sentence-level analysis, which makes it ideal for evaluating bulleted or fragmented text.

20 - \frac{s in g l e S y l l ab l e W or d s _{150}}{10}

When should I use FORCAST?

FORCAST is designed for non-narrative text: instructions, forms, technical manuals. It does not require sentence-level analysis.

Classic 0–100 readability score.

U.S. grade level for your text.

Penalises complex (3+ syllable) words.

Health & medical text grade level.