Free tool

Audiobook duration calculator

How many hours is that book? Enter a word count (or pages) and get listening time at typical narration speeds.
Word count
or pages (≈ 275 words each)
Relaxed (130 wpm)
11 h 32 min
Typical audiobook (150 wpm)
10 h 00 min
Brisk (175 wpm)
8 h 34 min
Sped up (200 wpm)
7 h 30 min
At a typical pace this is 10 h 00 min of narration: about 4 months on Listener (3 h/month); within one month on Premium (15 h/month); any length on Ultra. Chapters you have already heard replay free.

How the estimate works

Professional audiobook narration runs at about 150 to 160 words per minute; a relaxed reading is nearer 130, a brisk one 175, and listeners who speed up playback often settle around 200. The calculator divides the word count by each pace. Page counts are converted at 275 words per page, the average for a trade paperback; use the word count when you know it.

Typical lengths

Novella (25,000 words): about 2 h 45 min at 150 wpm.
Average novel (90,000 words): about 10 h.
Epic fantasy volume (250,000 words): about 28 h.
Journal article (8,000 words): under an hour.
Textbook chapter (12,000 words): about 1 h 20 min.

Fitting a book into a plan

Book2Speech plans include a monthly allowance of new narration: 3 hours (Listener), 15 hours (Premium) or unlimited (Ultra). Replaying chapters you have already heard is free. The calculator shows how a book divides across months at each allowance.

Questions people ask

Where do I find the word count?

Word and Google Docs show it under Tools. For an EPUB, Calibre’s book details or the Book2Speech library show the count after parsing. Publishers often list it on the product page.

Does playback speed change the total?

Yes, proportionally: at 1.25× a 10-hour book takes 8 hours.
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