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Book · by Andy Weir

How many pages is Project Hail Mary?

Project Hail Mary by Andy Weir has a median of 496 pages across 8 English-language print editions with a recorded page count; the middle half of editions run 491 to 496 pages.

Median pages
496
8 editions counted
Range
448–794
shortest to longest edition
Reading time
8.7h
at 260 wpm (fiction average)
Words (est.)
136k
at 275 words per page

How long will Project Hail Mary take you?

Starts at the fiction average of 260 words per minute and 275 words per page. Move the slider to your own speed.

Reading time
8 h 45 min
At 30 min a day
18 days
At 1 hour a day
9 days

Page count of every edition, by year

Each dot is one English-language print edition. Shaded: middle half of editions. Line: median.

400600800202120222023202420252021: 476 pages2021: 794 pages2021: 496 pages2022: 496 pages2022: 448 pages2022: 496 pages2025: 496 pagesmedian 496
400600800202220242021: 476 pages2021: 794 pages2021: 496 pages2022: 496 pages2022: 448 pages2022: 496 pages2025: 496 pagesmedian 496
Open Library edition records (2026-09-30 dump). 1 edition without a publication year not plotted.

Editions counted

The 8 editions behind the figures above, newest first. Open Library lists 32 editions of this work in all languages and formats.

YearPublisherFormatPagesOpen Library
2025Penguin Books, Limitedpaperback496OL60855498M
2022Penguin BooksPaperback496OL35577396M
2022Random House Publishing Group–448OL33924201M
2022Ballantine Bookspaperback496OL38627505M
2021Ballentine BooksPaperback476OL50528652M
2021Random House Large Printpaperback794OL29597011M
2021Ballantine Bookshardcover496OL30036715M
––paperback496OL32553390M

More by Andy Weir

All 3 books by Andy Weir with page counts

Questions

How many pages is Project Hail Mary?
About 496 pages: that is the median of 8 English-language print editions on Open Library. Editions range from 448 to 794 pages.
How long does it take to read Project Hail Mary?
About 8 h 45 min at 260 words per minute, assuming 275 words per page. At 30 minutes a day that is 18 days.
How many words is Project Hail Mary?
Roughly 136,000 words, estimated from the median page count at 275 words per page. Open Library does not record word counts, so this is an estimate.

Data: Open Library monthly data dumps (works, editions, authors, reading log, ratings) (Open Library / Internet Archive); How many words do we read per minute? A review and meta-analysis of reading rate (Marc Brysbaert, Journal of Memory and Language 109 (2019)).