R U Pissed? - Online Breathalyzer Test and Blood Alcohol Content (BAC) Level Calculator - Hangover Cures
Everything you ever need to know about alcohol. Using the BAC, assuming you weigh 70kg you're probably going to want to drink 7-8 beers to get drunk.
Protip: Don't drink straight Vodka if you don't like the taste (personally I can handle the taste but I don't particularly like it) then mix it with cordial/softdrink/etc