On average, you are probably able to metabolize about half-a-drink per hour. But the speed at which you break down alcohol depends on a whole lot of things.
First of all, how big are you?
What is your age?
What is your metabolism and general health like?
How much food did you have in your stomach to soak up the alcohol so that it didn’t get absorbed into your bloodstream?
What kinds of drinks did you have and what was their alcohol content?
Keep in mind that even if your body can clear alcohol from your bloodstream at an average rate of 0.015 per hour, a breathalyzer or blood test can still detect alcohol for up to 12 hours, a urine test for up to 3 to 5 days, and a hair test for up to 90 days.
