The chart above was made by Alcohol.org after they did a very interesting survey. According to that Survey the national average amount of beers it takes to feel drunk is 3.85!
They also ranked all 50 states according to how many beers people can drink in one sitting before they feel drunk. Arizona, Michigan, and Maine can drink the most at around 4 beers. Hawaii came in last at 2.7 beers, then Idaho and Arkansas. Washington State came in at 3.18 beers.
You can read all about the survey HERE