How long does it take to translate a book?
By the DocBabel Editorial Team · Reviewed October 8, 2026
Short answer: an 80,000-word book may require about 32 working days for a straightforward first draft at 2,500 words per day, or roughly 80 working days for a challenging literary workflow averaging 1,000 finished words per day. Availability, editing, author review, and proofreading extend the calendar schedule.
A reliable estimate separates productive translation time from elapsed calendar time. The first depends mainly on word count and complexity. The second also includes finding a translator, waiting for an available start date, revision rounds, and production.
A measured DocBabel example: a 26,525-word book
On October 8, 2026, we translated Lewis Carroll’s Alice’s Adventures in Wonderland from English to Spanish through the live DocBabel translator. The AI draft was available in 16.7 seconds after clicking Translate.
- Input
- 26,525 words · TXT · 151,095 bytes
- Language pair
- English → Spanish
- Measurement
- Translate click → result received in the browser
- Plan and usage
- Existing Pro subscription · one translation credit
This is one measured run with a text file, not a delivery guarantee for other books or scanned PDFs. It includes upload and processing, but excludes choosing the file, signing in, and human editing. We checked the opening, middle, ending, and presence of all twelve chapters; we have not performed a full bilingual editorial review. The downloadable result is the unedited AI draft.
Alice was beginning to get very tired of sitting by her sister on the bank, and of having nothing to do: once or twice she had peeped into the book her sister was reading, but it had no pictures or conversations in it, “and what is the use of a book,” thought Alice “without pictures or conversations?”Alicia empezaba a estar muy cansada de sentarse junto a su hermana en la orilla, y de no tener nada que hacer: una o dos veces había echado un vistazo al libro que su hermana estaba leyendo, pero no tenía dibujos ni conversaciones en él, «¿y de qué sirve un libro», pensó Alicia «sin dibujos ni conversaciones?».Source: Project Gutenberg, ebook 11. The input contains the public-domain book text, with the Gutenberg header and footer removed. For the monthly fee and what a credit includes, see our book translation cost example.
Estimate translation time by word count
Start with this formula, then add the editorial and scheduling stages required by your project:
Source words ÷ productive words per day = translation working days
| Book length | At 2,500/day | At 1,000/day |
|---|---|---|
| 30,000 words | 12 days / about 2.5 weeks | 30 days / about 6 weeks |
| 80,000 words | 32 days / about 6.5 weeks | 80 days / about 16 weeks |
| 120,000 words | 48 days / about 9.5 weeks | 120 days / about 24 weeks |
| 200,000 words | 80 days / about 16 weeks | 200 days / about 40 weeks |
Methodology: the American Translators Association uses 2,500 source words per day as an example for scheduling a technical guide. In an ATA article about literary books, an experienced translator describes 800-1,000 finished words per day as a practical full-workflow average. These anchors illustrate how strongly genre and quality scope affect the answer; they are not delivery guarantees.
Why calendar time is longer than translation time
A translator may not be available when the manuscript is ready. Once work starts, research, terminology management, and self-revision are part of the translation rather than optional extras. Difficult prose can therefore progress much more slowly than a straightforward technical text.
A publication workflow then adds bilingual editing, author queries, corrections, proofreading, and layout checks. Some stages can overlap, but rushing all of them increases the risk of inconsistent terminology, missing text, and formatting errors.
The literary translator interviewed by ATA estimates 14 weeks of exclusive work for a challenging 70,000-word book, then doubles that to at least six calendar months to account for concurrent projects and other responsibilities. That example explains why a delivery date cannot be calculated from raw drafting speed alone.
How AI changes the timeline
AI can compress the first-draft stage from weeks to hours, but processing speed is not the same as a publication-ready result. The total schedule still depends on file preparation, output length, language pair, and the level of human review required.
For personal reading or internal evaluation, a lightly reviewed AI translation may be sufficient. For commercial publishing, specialist material, or text where errors have serious consequences, plan time for a qualified reviewer to compare the output with the source and check terminology, omissions, style, and layout.
A useful project plan therefore records two dates: when the translated draft will be available and when the reviewed final version will be ready. This prevents a fast first draft from being mistaken for a finished book.
Sources
- American Translators Association, Scheduling Translation Projects
- American Translators Association, literary book scheduling perspectives
Update note: unsupported universal timelines were replaced with word-count formulas, explicit assumptions, and ATA planning examples on August 13, 2026.
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