Word counts are calculated by counting the number of characters (including spaces), dividing by the standard-word length of 6, and rounding the result. [source]
Reading time is calculated based on an average reading speed of 260 words per minute for fiction books. [source]
Pages counts are based on an average word count of 275 words per page. [source]
Example: The Lord of the Rings triology has 455,125 words. Based on our reading estimates, that's about 1,655 pages and an average reading time of 29 hours 11 minutes
Example: All Harry Potter books together have 1,111,319 words. Based on our reading estimates, that’s about 4,041 pages and 71 hours 15 minutes of reading time.