What is your BAC after 3 beers?

Could you please clarify for me, what would be the approximate Blood Alcohol Concentration (BAC) level of an individual after consuming three beers? Is there a standard measurement that can be applied across different individuals, or does it vary depending on factors such as weight, gender, and the type of beer consumed? I'm particularly interested in understanding the potential effects of alcohol consumption on driving abilities and the legal implications associated with exceeding certain BAC limits.