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The speeds, cited
Silent reading is computed at 240 words per minute and reading aloud at 180 words per minute, rounded from Brysbaert's 2019 meta-analysis of adult reading rates (238 and 183 wpm respectively). Audiobook length uses the industry convention of about 9,300 finished words per hour, the figure ACX uses to estimate production length.
No proprietary scoring, no “AI analysis” — every number on this page is arithmetic you could redo on a napkin, and the formulas are stated where the results appear.
What the prose stats are good for
- 1Average sentence length tracks register: commercial thrillers often sit near 10–14 words, literary fiction higher. A chapter that drifts far from your baseline usually reads differently than you intended.
- 2The longest sentence is worth reading aloud. If you run out of breath, your reader ran out two clauses earlier.
- 3Dialogue percentage is a pacing dial. Scenes heavy in dialogue read fast; long stretches under ~15% can signal an exposition block worth breaking up.
Frequently Asked Questions
How fast does the average person read?
A large 2019 meta-analysis by Marc Brysbaert puts average adult silent reading at roughly 238 words per minute for non-fiction and slightly faster for fiction, with reading aloud around 183 words per minute. This calculator uses 240 wpm silent and 180 wpm aloud as round, honest defaults — individual readers range from under 150 to over 400 wpm.
How is audiobook length estimated?
The audiobook industry plans around roughly 9,300 finished words per hour — the convention ACX (Audible’s production platform) uses for estimating finished length from a manuscript. A 90,000-word novel therefore lands near 9 hours 40 minutes finished. Narration pace, pauses, and chapter breaks shift the real number slightly in either direction.
How many words are on a page in a 6 x 9 paperback?
Around 350 words for standard fiction typography (11–12 pt serif, normal leading). Smaller trims hold fewer: roughly 300 words on a 5 x 8 page and 330 on a 5.5 x 8.5. Large print, generous margins, and heavy dialogue all lower words-per-page — which is why these are estimates, not promises. Your final KDP page count comes from your formatted interior file.
Is my manuscript uploaded anywhere when I paste it here?
No. The analysis runs entirely in your browser — the page never sends your text to a server, stores it, or logs it. Close the tab and it is gone. This is also why the tool stays fast on very large pastes: there is no upload step at all.
What counts as dialogue in the dialogue percentage?
Words inside paired double quotation marks, straight ("…") or curly (“…”). Single-quoted dialogue (the UK convention) and unquoted internal monologue are not counted, so treat the percentage as a floor rather than an exact measure. Commercial fiction commonly runs 30–60% dialogue; literary fiction often runs lower.
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