# Online Calculator

## Blood Alcohol Concentration Limits by State

### HOW TO CALCULATE BAC    (Blood Alcohol Content)     The following chart shows estimated percent of alcohol in the blood by number of drinks in relation to body weight. This percent can be estimated by the following:

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 lbs. man - 8 drinks in 4 hours / .167% minus (.015x4) = .107%)
 D R I N K S WEIGHT 1 2 3 4 5 6 7 8 9 10 11 12 100 lbs .038 .075 .113 .150 .188 .225 .263 .300 .338 .375 .413 .450 110 lbs .034 .066 .103 .137 .172 .207 .241 .275 .309 .344 .379 .412 120 lbs .031 .063 .094 .125 .156 .188 .219 .250 .281 .313 .344 .375 130 lbs .029 .058 .087 .116 .145 .174 .203 .232 .261 .290 .320 .348 140 lbs .027 .054 .080 .107 .134 .161 .188 .214 .241 .268 .295 .321 150 lbs .025 .050 .075 .100 .125 .151 .176 .201 .226 .251 .276 .301 160 lbs .023 .047 .070 .094 .117 .141 .164 .188 .211 .234 .258 .281 170 lbs .022 .045 .066 .088 .110 .132 .155 .178 .200 .221 .244 .265 180 lbs .021 .042 .063 .083 .104 .125 .146 .167 .188 .208 .229 .250 190 lbs .020 .040 .059 .079 .099 .119 .138 .158 .179 .198 .217 .237 200 lbs .019 .038 .056 .075 .094 .113 .131 .150 .169 .188 .206 .225 210 lbs .018 .036 .053 .071 .090 .107 .125 .143 .161 .179 .197 .215 220 lbs .017 .034 .051 .068 .085 .102 .119 .136 .153 .170 .188 .205 230 lbs .016 .032 .049 .065 .081 .098 .115 .130 .147 .163 .180 .196 240 lbs .016 .031 .047 .063 .078 .094 .109 .125 .141 .156 .172 .188