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Book · by Carl Sagan · first published 1980

How many pages is Cosmos?

Cosmos by Carl Sagan has a median of 365 pages across 16 English-language print editions with a recorded page count; the middle half of editions run 304 to 396 pages.

Median pages
365
16 editions counted
Range
208–487
shortest to longest edition
Reading time
7.0h
at 238 wpm (non-fiction average)
Words (est.)
100k
at 275 words per page

How long will Cosmos take you?

Starts at the non-fiction average of 238 words per minute and 275 words per page. Move the slider to your own speed.

Reading time
7 h 02 min
At 30 min a day
15 days
At 1 hour a day
8 days

Page count of every edition, by year

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

20030040050019801990200020101980: 365 pages1980: 354 pages1980: 365 pages1980: 390 pages1981: 365 pages1983: 418 pages1983: 413 pages1983: 384 pages1984: 487 pages1985: 324 pages1995: 413 pages2002: 365 pages2015: 210 pages2016: 244 pages2016: 208 pages2016: 208 pagesmedian 365
200300400500198020001980: 365 pages1980: 354 pages1980: 365 pages1980: 390 pages1981: 365 pages1983: 418 pages1983: 413 pages1983: 384 pages1984: 487 pages1985: 324 pages1995: 413 pages2002: 365 pages2015: 210 pages2016: 244 pages2016: 208 pages2016: 208 pagesmedian 365
Open Library edition records (2026-09-30 dump).

Editions counted

The 16 editions behind the figures above, newest first. Open Library lists 74 editions of this work in all languages and formats.

YearPublisherFormatPagesOpen Library
2016CreateSpace Independent Publishing Platform–244OL56640413M
2016CreateSpace Independent Publishing Platform–208OL55794989M
2016CreateSpace Independent Publishing Platform–208OL56137627M
2015CreateSpace Independent Publishing Platform–210OL56480593M
2002Random House–365OL3568862M
1995Abacus–413OL22114495M
1985Ballantine Books–324OL24939210M
1984Macdonald–487OL22450595M

More by Carl Sagan

All 4 books by Carl Sagan with page counts

Questions

How many pages is Cosmos?
About 365 pages: that is the median of 16 English-language print editions on Open Library. Editions range from 208 to 487 pages.
How long does it take to read Cosmos?
About 7 h 02 min at 238 words per minute, assuming 275 words per page. At 30 minutes a day that is 15 days.
How many words is Cosmos?
Roughly 100,000 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)).