Blood Alcohol Calculator

Blood Alcohol Calculator:





Blood Alcohol Calculator:
Blood Alcohol Concentration ("BAC") is the amount of alcohol present in a person's bloodstream. In legal matters, a BAC can be used to verify an individual's alcohol impairment.

A person's BAC is determined by several factors including the number of drinks consumed, the type of drink consumed, the body weight of the drinker, and the amount of time that has elapsed since the first drink was consumed.

To calculate a person's BAC, follow the directions below:

1) Count the total number of drinks consumed. One drink is equivalent to...
- one ounce of 100-proof liquor; or
- one 5-ounce glass of table wine; or
- one 12-ounce bottle of regular beer

2) Using the chart below, find the box where the number of drinks corresponds to the body weight of the person. The number in the box is the percent of blood alcohol produced after drinking.
(For example: 120 lbs. and 5 drinks = 0.156% .)

3) Calculate the percent of alcohol removed from the body since the first drink consumed. This value is obtained by multiplying the number of hours elapsed by 0.015%.
(For example: 6 hours x 0.015% = 0.09% .)

4) Subtract the result of Step #3 from the result of Step #2. This is the final BAC percentage.

DRINKS

Body weight 1 2 3 4 5 6 7 8 9 10 11 12
100 lb. .038 .075 .113 .150 .188 .225 .263 .300 .338 .375 .413 .450
110 lb. .034 .066 .103 .137 .172 .207 .241 .275 .309 .344 .379 .412
120 lb. .031 .063 .094 .125 .156 .188 .219 .250 .281 .313 .344 .375
130 lb. .029 .058 .087 .116 .145 .174 .203 .232 .261 .290 .320 .348
140 lb. .027 .054 .080 .107 .134 .161 .188 .214 .241 .268 .295 .321
150 lb. .025 .050 .075 .100 .125 .151 .176 .201 .226 .251 .276 .301
160 lb. .023 .047 .070 .094 .117 .141 .164 .188 .211 .234 .258 .281
170 lb. .022 .045 .066 .088 .110 .132 .155 .178 .200 .221 .244 .265
180 lb. .021 .042 .063 .083 .104 .125 .146 .167 .188 .208 .229 .250
190 lb. .020 .040 .059 .079 .099 .119 .138 .158 .179 .198 .217 .237
200 lb. .019 .038 .056 .075 .094 .113 .131 .150 .169 .188 .206 .225
210 lb. .018 .036 .053 .071 .090 .107 .125 .143 .161 .179 .197 .215
220 lb. .017 .034 .051 .068 .085 .102 .119 .136 .153 .170 .188 .205
230 lb. .016 .032 .049 .065 .081 .098 .115 .130 .147 .163 .180 .196
240 lb. .016 .031 .047 .063 .078 .094 .109 .125 .141 .156 .172 .188

[Created from NHTSA chart, with modifications]


10.0Gregory Wayne Schwesinger
10.0Saad Qamer Qadri