BAC Calculator
Determine Your Estimated Blood Alcohol Concentration
About the Drink Wheel
The Intoximeters Inc. "Drink Wheel" is a form that you can fill out. Upon completion they will instantly compute your estimated blood / breath alcohol concentration (BAC) based on the information that you have provided and return that estimate to you. It is presented as a public service to web site visitors. Its primary purpose is to provide useful information about the responsible use of alcohol.
Why Is It Called a "Drink Wheel"?
It is called a "Drink Wheel" because it is based on various paper and cardboard BAC calculators that are given out in alcohol awareness programs, some of which are in the form of a wheel that you can spin around to calculate your estimated BAC based on what and how much you have had to drink.
Disclaimer
It would be extremely foolish for anyone to pretend that the "Drink Wheel" can tell you what your BAC actually is. There are too many variables that determine your BAC and level of impairment and intoxication that cannot be taken into account in any chart or formula.
A person's actual BAC is dependent on many complex factors, including their physical condition (body composition, health, etc.) and what they have recently ingested (including food, water, medications and other drugs).
The results that are generated are rough estimates of an average healthy person's BAC assuming typical beverage sizes, recipes and alcohol content. The BAC estimates generated by the Drink Wheel should not be used to infer anyone's fitness to work, drive or perform any other task or duty.
How To Calculate Your Estimated Blood Alcohol Content (BAC)
The chart below shows an estimated percent of alcohol in the blood by number of drinks in relation to body weight.
This percent can be estimated by the following:
- 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).
- Use the chart below and under number of "drinks" and opposite "body weight" find the percent of blood alcohol listed.
- Subtract from the BAC number the percent of alcohol "metabolized" during the time elapsed since your first drink. This average elimination rate of alcohol is .015% per hour. (Example: 180 lb. man - 8 drinks in 4 hours = .168% BAC minus (.015% elimination rate x 4hrs) = .060% of the alcohol has been metabolized. Thus your BAC is .108%.
Alcohol Metabolism Chart
Source: United States Department of Transportation
Number of Standard Drinks for Males
Body Weight
1
2
3
4
5
6
7
8
9
10
11
12
100 lb.
.038
.076
.114
.152
.190
.228
.266
.304
.342
.380
.418
.456
110 lb.
.034
.068
.102
.136
.170
.204
.238
.272
.306
.340
.374
.408
120 lb.
.031
.063
.094
.125
.155
.186
.217
.248
.279
.310
.341
.372
130 lb.
.029
.058
.087
.116
.145
.174
.203
.232
.261
.290
.320
.348
140 lb.
.027
.054
.081
.108
.135
.162
.189
.216
.243
.270
.297
.324
150 lb.
.025
.050
.075
.100
.125
.150
.175
.200
.225
.250
.275
.300
160 lb.
.023
.046
.069
.092
.115
.138
.161
.184
.207
.230
.253
.276
170 lb.
.022
.044
.066
.088
.110
.132
.154
.176
.198
.220
.242
.264
180 lb.
.021
.042
.063
.084
.105
.126
.147
.168
.189
.210
.231
.252
190 lb.
.020
.040
.060
.080
.100
.120
.140
.160
.180
.200
.220
.240
200 lb.
.019
.038
.057
.076
.095
.114
.133
.152
.171
.190
.209
.228
210 lb.
.018
.036
.054
.072
.090
.108
.126
.144
.162
.180
.198
.216
220 lb.
.017
.034
.051
.068
.085
.102
.119
.136
.153
.170
.187
.204
230 lb.
.016
.032
.048
.064
.080
.096
.112
.128
.144
.160
.176
.192
240 lb.
015
.030
.045
.060
.075
.090
.105
.120
.135
.150
.172
.188
250 lb.
015
.030
.045
.060
.075
.090
.105
.120
.135
.150
.172
.188
Number of Standard Drinks for Females
Body Weight
1
2
3
4
5
6
7
8
9
10
11
12
100 lb.
.047
.094
.141
.188
.235
.282
.329
.376
.423
.470
.517
.564
110 lb.
.042
.084
.126
.168
.210
.252
.294
.336
.378
.420
.462
.504
120 lb.
.039
.078
.117
.156
.195
.234
.273
.312
.351
.390
.429
.468
130 lb.
.036
.072
.108
.144
.180
.216
.252
.288
.324
.360
.396
.432
140 lb.
.033
.066
.099
.132
.165
.198
.231
.264
.297
.330
.363
.394
150 lb.
.031
.062
.093
.124
.155
.186
.217
.248
.279
.310
.341
.372
160 lb.
.029
.058
.087
.116
.145
.174
.203
.232
.261
.290
.319
.348
170 lb.
.027
.054
.081
.108
.135
.162
.189
.216
.243
.270
.297
.324
180 lb.
.026
.052
.078
.104
.130
.156
.182
.208
.234
.260
.286
.312
190 lb.
.024
.048
.072
.096
.120
.144
.168
.192
.216
.240
.264
.288
200 lb.
.023
.046
.069
.092
.115
.138
.161
.184
.207
.230
.253
.276
210 lb.
.022
.044
.066
.088
.110
.132
.154
.176
.198
.220
.242
.264
220 lb.
.021
.042
.063
.084
.105
.126
.147
.168
.189
.210
.231
.252
230 lb.
.020
.040
.060
.080
.100
.120
.140
.160
.180
.200
.220
.240
240 lb.
.019
.038
.057
.076
.095
.114
.133
.152
.171
.190
.209
.228
250 lb.
.018
.036
.054
.072
.090
.108
.126
.144
.162
.180
.198
.216
Disclaimer:
All BAC Charts and calculators are for estimation purposes only. These are rough estimates of average BAC levels for the average person. There are many variables that determine BAC levels that cannot be taken into account in charts like these. These BAC estimates should not be used to infer anyone's ability to operate a motor vehicle.
