Alcohol affects everyone differently. If you don't normally drink, a single beer could put you out of commission. For the most part, by the time you feel drunk, you're well past the legal limit.
In general, the more you weigh, the more you'd have to drink before you'd be considered drunk. Consider this: A 210-pound male could drink six beers in an hour and still not be legally drunk in many states. His blood-alcohol content would be 0.0984. If a 150-pound man drank the same amount, his blood-alcohol content would be 0.14258 - nearly 1½ times the legal limit.
Gender also affects your blood-alcohol content. The female counterpart to a 150-pound drunken male would have a blood-alcohol content of 0.17097 after consuming six drinks in an hour.
The slower you drink, the more time your body has to metabolize the alcohol. Each hour you add takes 0.012 off your blood-alcohol content, according to the formula the calculator uses.
