Calculate your blood alcohol level

Blood alcohol content (BAC), also called  blood alcohol level is most commonly used as a metric of alcohol intoxication for legal or medical purposes.

Blood alcohol content is usually expressed as a percentage of alcohol (generally in the sense of ethanol) in the blood in units of mass of alcohol per volume of blood or mass of alcohol per mass of blood, depending on the country.

Your liver metabolizes (or burns) alcohol at a constant rate – about 1 gram per hour for every 10 kilograms (22 pounds) of body weight. Exercising or drinking coffee will not get alcohol out of your body any sooner. Although you may not feel some of the effects of alcohol your body is working long after you drink to get rid of the alcohol in your system. Depending on how much you drink and your weight, your liver can be under extra strain for a very long time. This is one example of the health risks of heavy drinking.

What do other BAC scores mean?

0.00 - 0.01
You're really not feeling the effects of alcohol right now.

0.02 - 0.03
You might feel a little more relaxed, perhaps a little light-headed. If you're shy you might lose a bit of your shyness. The typical depressant effects of alcohol are not affecting you at this stage and you probably haven’t lost any of your coordination.

0.04 - 0.06
You're probably feeling a bit relaxed or you might have a feeling of "well-being" or euphoria (feeling really good or really positive). You might feel a bit warmer than you usually do. Your behavior might be a bit exaggerated or your emotions might be a bit intensified. You're probably feeling some impairment of reasoning and memory and since your level of caution is lower, it's a bad idea to drive.

0.07 - 0.09
Although you can definitely tell you've been drinking, and you're probably aware that you're feeling some effects of alcohol, you might believe that you're more alert than you really are. In reality, with a BAC of 0.07 – 0.09 you'll be experiencing a slight impairment of speech, balance and hearing and your reaction time is reduced. Your caution, reasoning and memory are impaired, and your judgment and level of self-control are reduced. Note: Many countries have laws that forbid people to drive if they have a BAC of 0.05 or more. Most countries have laws that forbid people to drive if they have a BAC of 0.08+. No matter where you live or where you are, definitely don’t drive – take a cab or plan to stay the night.

0.10 - 0.125
If your BAC is between 0.10 and 0.125 your speech will be slurred and your balance, vision, reactions time and hearing will be impaired. Your motor coordination will also be significantly impaired and you'll have a loss of good judgment. Note: No matter where you live, it's illegal to drive. In fact, it'd be extremely irresponsible to drive anything at this point: including a boat, snowmobile, off-road vehicle – even a riding lawnmower. Not a good idea. Don't even think about it.

0.13 - 0.15
Right now, you'd be feeling gross motor impairment and a lack of physical control. It'd probably be hard for you to type on the keyboard and your monitor or mobile phone screen would appear blurry. Your judgment and perception of what’s going on would be severely impaired and any feeling of euphoria (feeling really good or really positive) you had earlier will have turned to dysphoria (an emotional state of agitation, unease or depression). You'd have gross motor impairment and a lack of physical control.

0.16 - 0.19
You'll probably start to feel sick to your stomach. Any euphoria (feeling really good or really positive) you had earlier will have turned to dysphonia (an emotional state of agitation, unease or depression). Right now you might look like a "sloppy drunk". 0.20 If your BAC is 0.20, you'll probably need help if you want to walk properly. If you fall down you probably won't feel a lot of pain – even if you hurt yourself. At this level of BAC, some people begin to vomit. At the very least, you'll feel dazed, confused and disoriented. Note: At this point your gag reflex will be impaired. This means that if you're lying down and you vomit, you could choke and die.

0.21 - 0.30
If you were awake at this point you'd have very little comprehension as to where you were or what you were doing. You might pass out suddenly and it'd be hard to wake you up.

0.30 - 0.35+
It's possible that you might fall into a coma. You might die due to the paralysis of your diaphragm, the collapse of your lungs, or heart attack (any form of respiratory arrest).