How long does it take to watch an anime?
#Too long; didn’t read: Divide the number of episodes 2.67
A regular episode of anime is about 24 minutes. Sometimes they are 23:40 and sometimes it's 24:10, but it usually works out to about 24 minutes per episode.
If you simply divide 60 (the number of minutes in an hour) by 24 you get 2.5. If you divide the number of episodes (like say: 12) by 2.5 you should get up the number of hours it would take to watch the show continuously. In the case of 12 it would be 4.8. This works fine enough, but we can refine that further.
OPs and EDs are 90 seconds each, so both together are 3 minutes. If you skip all OPs and EDs all the time that would be 21 minutes per episode. 60/21 is 2.857142 . If you watch all OPs and skip all EDs, or vice versa, or do half and half of each that would be 22.5 minutes (22.5 is the mean average of 21 and 24) which leads to 2.666 (repeating of course) which we can safely round to 2.67. This last example is my personal behavior and the behavior of a lot of people i know, and i imagine the behavior of a lot of people who watch anime so it is the primary divisor i use.
Let’s look at some examples:
A 12 episode anime would take ~4.49 hours to watch. (12/2.67=4.49438)
A 26 episode anime would take ~9.74 hours to watch. (26/2.67=9.7378)
A 148 episode anime would take ~55.43 hours to watch. (148/2.67=55.430711610)