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BAC

Drinking & Driving BAC Estimation Tables

Note that the charts and calculations to estimate blood alcohol concentration that we provide here make several simplifying assumptions. Accordingly, the data that they provide should only be used for entertainment purposes, and cannot be relied upon to infer anyone’s actual fitness to work, drive, or to perform any other task or duty:

BAC & DWI Charges in Western New York

DWI stands for "Driving While Intoxicated", which means drunken driving. In New York State, a Blood Alcohol Content (BAC) of 0.08% is considered intoxicating, so that driving becomes significantly impaired - reflexes are slowed, judgment of speed, depth perception and ability to brake or control the vehicle diminish. New York State does not officially recognize an individual's tolerance to alcohol with respect to an individual BAC over 0.08%.

1. BRAD BAC Estimation Chart for Men

Approximate Blood Alcohol Concentration (%)

Drinks

Body Weight (lbs)

Comments

100

120

140

160

180

200

220

240

0

.00

.00

.00

.00

.00

.00

.00

.00

Safest Driving

1

.04

.03

.03

.02

.02

.02

.02

.02

Driving Skills Highly Impaired

Criminal Penalties Possible

2

.08

.06

.05

.05

.04

.04

.03

.03

3

.11

.09

.08

.07

.06

.06

.05

.05

4

.15

.12

.11

.09

.08

.08

.07

.06

5

.19

.16

.13

.12

.11

.09

.09

.08

6

.23

.19

.16

.14

.13

.11

.10

.09

Legally Intoxicated

Criminal Penalties

7

.26

.22

.19

.16

.15

.13

.12

.11

8

.30

.25

.21

.19

.17

.15

.14

.13

9

.34

.28

.24

.21

.19

.17

.15

.14

10

.38

.31

.27

.23

.21

.19

.17

.16

Death Possible

Subtract 0.01% for each 40 minutes of drinking.
One drink is 1.25 oz. of 80 proof liquor, 12 oz. of beer, or 5 oz. of table wine.


2. BRAD BAC Estimation Chart for Women

Approximate Blood Alcohol Concentration (%)

Drinks

Body Weight (lbs)

Comments

90

100

120

140

160

180

200

220

240

0

.00

.00

.00

.00

.00

.00

.00

.00

.00

Safest Driving

1

.05

.05

.04

.03

.03

.03

.02

.02

.02

Driving Skills Highly Impaired

Criminal Penalties Possible

2

.10

.09

.08

.07

.06

.05

.05

.04

.04

3

.15

.14

.11

.10

.09

.08

.07

.06

.06

4

.20

.18

.15

.13

.11

.10

.09

.08

.08

5

.25

.23

.19

.16

.14

.13

.11

.10

.09

6

.30

.27

.23

.19

.17

.15

.14

.12

.11

Legally Intoxicated

Criminal Penalties

7

.35

.32

.27

.23

.20

.18

.16

.14

.13

8

.40

.36

.30

.26

.23

.20

.18

.17

.15

9

.45

.41

.34

.29

.26

.23

.20

.19

.17

10

.51

.45

.38

.32

.28

.25

.23

.21

.19

Death Possible

Subtract 0.01% for each 40 minutes of drinking.
One drink is 1.25 oz. of 80 proof liquor, 12 oz. of beer, or 5 oz. of table wine.


These data were obtained from BRAD (Be Responsible About Drinking)

More information is available from Virginia Tech Alcohol Abuse Prevention.

3. The "Drink Wheel" BAC Estimation Calculator

The Online Blood/Breath Alcohol Level Calculator will instantly compute and display your estimated Blood/Breath Alcohol Concentration (BAC), based upon information that you provide. It is presented as a public service, and its primary purpose is to provide useful information about the responsible use of alcohol.

4. Breath Alcohol Ignition Interlocks

The court may rule that an Ignition Interlock Device (IID) should be fitted to your vehicle. This device requires any driver of that vehicle to blow into a mouthpiece and pass a breathalyzer test before the vehicle can be started. If the device detects a Breath Alcohol Concentration (BAC) that exceeds the programmed maximum level, the vehicle engine cannot be started.

In order to prevent another person providing a valid breath sample, the IID is designed to demand additional breath samples at random intervals while the engine is running. If a valid breath sample cannot be provided the IID will log the sample, warn the driver, and then trigger an alarm (lights flashing and/or horn honking) until the vehicle ignition is turned off.

Ignition Interlock Manufacturers
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