It might even take upwards of a 100 hours if you complete all side activities.
A few weeks ago, a rumor suggested that it would take about 35 hours to complete Hogwarts Legacy and about double the amount of time if you also did all or most of the side quest.
"So we are finding it is hard to put a number on, just based on playstyles. But for a first-time playthrough, if you just go through the mainline, you are looking at a 40 hour plus experience. If you decide that you want to do everything you are at over 100 hours, 120 hours probably."
While this of course is an estimate, it still seems like Hogwarts Legacy is going to be an absolutely massive game, as Kelly Murphy reveals he haven't even discovered everything yet despite working on the game from the very beginning:
"Anecdotally, I've worked on the game for six years, and I've played through it multiple times, and I have not seen every part of Hogwarts. There are parts of Hogwarts, the school, that I haven't even seen."
Hogwarts Legacy will be released on PlayStation 5, Xbox Series, and Steam on February 10, followed by PlayStation 4 and Xbox One on April 4, and Switch on July 25.