Approximate Blood Alcohol Percentage Chart
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1Approximate Blood Alcohol Percentage
Drinks
Body Weight in Pounds
Influenced
100
120
140
160
180
200
220
240
1
.04
.04
.03
.03
.02
.02
.02
.02
Rarely
2
.09*
.07*
.06*
.06*
.05*
.04
.04
.04
3
.13
.11
.09*
.08*
.07*
.07*
.06*
.06*
4
.18
.15
.13
.11
.1
.09*
.08*
.07*
Possibly
5
.22
.18
.16
.14
.12
.11
.1
.09*
6
.26
.22
.19
.17
.15
.13
.12
.11
7
.31
.26
.22
.19
.17
.15
.14
.13
Definitely
8
.35
.29
.25
.22
.2
.18
.16
.15
9
.4
.33
.28
.25
.22
.2
.18
.17
10
.44
.37
.31
.28
.24
.22
.2
.18
The asterisk (*) indicates estimated levels of impairment that could mean a person is
influenced.
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Parent category: Medical