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How To Calculate Your Estimated
Blood Alcohol Content (BAC)
Showing estimated percent of alcohol
in the blood by number of drinks in relation to
body weight. This percent can be estimated by:
1. Count your drinks (1 drink equals
1 ounce of 100-proof liquor, one five ounce
glass of table wine or one 12-ounce bottle of
regular beer).
2. Use the chart below and under number
of "drinks" and opposite "body weight" find the
percent of blood alcohol listed.
3. Subtract from this number the percent
of alcohol "burned up" during the time elapsed
since your first drink. This figure is .015% per
hour. (Example: 180 lb.
man - 8 drinks in 4 hours / .167% minus (.015x4)
= .107 %
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