It's hard to give an exact number of how many cups of coffee people drink per day, as it varies greatly depending on the individual and their lifestyle. Some people may drink just one cup in the morning to start their day(I am one of them) , while others may consume several cups throughout the day to stay alert and focused.
I like to drink about two cups of coffee per day. I think that two cups is a good amount to start my day with, and I think that I have built up a good tolerance to caffeine.
According to a 2020 survey by the National Coffee Association in the United States, the average coffee drinker consumes about 3.1 cups of coffee per day. I personally drink around ~7 lol