That's not the easiest question to answer, particularly because a lot of people here applied on the web last year, which was a nightmare, due to problems with AMCAS. They kept changing the earliest day to submit it, there were website loading problems, application accessibility problems, submission problems... 😛 Not only that, but even if everything had gone smoothly, it's an individual situation, because everyone takes a different amount of time to write the personal essay(s). If you have all your transcript info. with you and handy, and your statement is already written, I would guess that it would take a couple of hours to get it filled out. You don't have to fill it all out at once though. You can complete a portion, save, and come back later to finish.