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Community Links
Blood/Breath Alcohol Concentration
(BAC) Calculator
Using the BAC calculator | What
can affect your BAC?
Disclaimer
Blood/Breath Alcohol Concentration (BAC) is the amount of alcohol in the
bloodstream or on one's breath. BAC is expressed as the weight of ethanol,
measured in grams, in 100 milliliters of blood, or 210 liters of breath. BAC can
be measured by breath, blood, or urine tests.
- California defines legal intoxication for purposes of driving as having a
BAC of 0.08 or greater. But alcohol affects driving skills
at BACs of 0.02 or even lower.
- Driving skills, especially judgment, are impaired in most people long
before they show signs of drunkenness. The public usually associates BAC
with "drunk driving." But it's more accurate to refer to
"alcohol-impaired" driving because you do not have to be
"drunk" to be impaired in your ability to safely drive a car.
Use this calculator to instantly compute your estimated blood/breath alcohol
concentration.
- But keep in mind the results generated are estimates.
- The primary purpose is to provide information about the responsible use of
alcohol.
Instructions: Please select weight, drinks consumed, time period
and gender and click the "compute your BAC" button:
This BAC calculator is "JavaScript-based"
and your browser will need to be JavaScript enabled. This calculator
may not work with some older browsers that do not support JavaScript.
- How much alcohol you drink.
- How fast you drink. In general, the quicker you drink, the higher
your peak BAC will be.
- Body size. Large people tend to reach lower BACs than smaller
people, given the same amount of alcohol.
- Food in your stomach. When there is food in your stomach, alcohol
is absorbed more slowly into the blood stream. The BAC rises more
rapidly when you drink on an empty stomach, because there is no food
in which to dilute the alcohol.
- Type of mixer used. Water and fruit juices mixed with alcohol may
slow the absorption process, while carbonated beverages may speed it
up.
- Gender differences.
- Women reach higher BACs faster because they have less water in
their bodies and more adipose tissue (fat), which is not easily
penetrated by alcohol.
- A man and a woman, with all other factors being equal, both
drinking the same amount of alcohol, will have different BAC
levels. Hers will be higher.
Your actual BAC is dependent on many complex factors, including your
emotional and physical condition and health, and what you've recently
ingested (including food, water, medications and other drugs).
- No blood/breath alcohol calculator is 100% accurate.
- The best that can be done is a rough estimation of your BAC level.
You should not consider this to be a guideline for how much you
can drink and still drive responsibly, or avoid being arrested!
Our recommendation is:
Don't drink and drive.
Period.
There are so many crazy's on the road already -- you need maximum
alertness just to be able to avoid being killed or injured by any one of
them.
NOTE: The basic formula for estimating a person's blood/breath
alcohol concentration comes from the National Highway Traffic Safety
Administration as interpreted by Wisconsin Dept. of
Transportation.
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Responsible Limits
We know you are responsible. But make sure your family and friends stay
within their personal limits.
www.MyLimits.info
Responsible Limits
We know you are responsible. But make sure your family and friends stay
within their personal limits.
www.MyLimits.info
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