BAC Calculator

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Important Disclaimer

This calculator provides estimates only. Actual BAC varies based on metabolism, food intake, medications, tolerance, and other individual factors. This tool is for educational purposes only. Never drink and drive.

Gender

Widmark factor: 0.68 (affects alcohol distribution)

Body Weight

Type of Drink

Number of Drinks

Drinking Duration (hours)

How long you spent drinking

Hours Since Last Drink

Time elapsed after your last drink

Estimated BAC

0.000%

Sober

Little to no impairment. Normal behavior and mood.

Total Alcohol

42.0g

Pure alcohol consumed

Time Until Sober

0h 0m

Until BAC reaches 0.000

US Legal Status

Under Limit

Below 0.08 US legal limit

BAC Scale

0.00

0.02

0.04

0.08

0.15

0.30+

BAC Impairment Levels

Sober0.000 - 0.020You are here

Little to no impairment. Normal behavior and mood.

Mildly Affected0.020 - 0.040

Slight euphoria, relaxation. Minor impairment of reasoning and memory.

Impaired0.040 - 0.080

Reduced coordination, impaired judgment, lowered alertness. Driving ability is significantly affected.

Legally Drunk (US)0.080 - 0.150

Poor muscle coordination, impaired self-control, reasoning, and memory. Illegal to drive in most US states.

Severely Impaired0.150 - 0.300

Major loss of balance, vomiting likely, significant mental impairment. Risk of blackout.

Life-Threatening0.300 - ...

Loss of consciousness possible, risk of alcohol poisoning, potential for death. Seek emergency medical attention.

Legal BAC Limits by Country

Country	Legal Limit	Your Status
United States	0.08%	Under Limit
United Kingdom	0.08%	Under Limit
Canada	0.08%	Under Limit
Australia	0.05%	Under Limit
Germany	0.05%	Under Limit
France	0.05%	Under Limit
Japan	0.03%	Under Limit
Sweden	0.02%	Under Limit
Norway	0.02%	Under Limit
Poland	0.02%	Under Limit

How This Was Calculated

Widmark Formula:

BAC = (Alcohol in grams / (Body weight in grams x r)) - (0.015 x hours)

Alcohol consumed: 3 x 12oz x 5% ABV = 42.0g

Widmark r factor (male): 0.68

Raw BAC (before metabolism): 0.001%

Metabolized (2.0h x 0.015): 0.030%

Estimated BAC: 0.000%

This is an estimate only based on the Widmark formula. Many factors affect actual BAC including food intake, body composition, hydration, medications, and individual metabolism. When in doubt, do not drive. If you or someone you know may have alcohol poisoning, call emergency services immediately.

⚠

Important Disclaimer

Gender

Widmark factor: 0.68 (affects alcohol distribution)

Body Weight

Type of Drink

Number of Drinks

Drinking Duration (hours)

How long you spent drinking

Hours Since Last Drink

Time elapsed after your last drink

Estimated BAC

0.000%

Sober

Little to no impairment. Normal behavior and mood.

Total Alcohol

42.0g

Pure alcohol consumed

Time Until Sober

0h 0m

Until BAC reaches 0.000

US Legal Status

Under Limit

Below 0.08 US legal limit

BAC Scale

0.00

0.02

0.04

0.08

0.15

0.30+

BAC Impairment Levels

Sober0.000 - 0.020You are here

Little to no impairment. Normal behavior and mood.

Mildly Affected0.020 - 0.040

Slight euphoria, relaxation. Minor impairment of reasoning and memory.

Impaired0.040 - 0.080

Reduced coordination, impaired judgment, lowered alertness. Driving ability is significantly affected.

Legally Drunk (US)0.080 - 0.150

Poor muscle coordination, impaired self-control, reasoning, and memory. Illegal to drive in most US states.

Severely Impaired0.150 - 0.300

Major loss of balance, vomiting likely, significant mental impairment. Risk of blackout.

Life-Threatening0.300 - ...

Loss of consciousness possible, risk of alcohol poisoning, potential for death. Seek emergency medical attention.

Legal BAC Limits by Country

Country	Legal Limit	Your Status
United States	0.08%	Under Limit
United Kingdom	0.08%	Under Limit
Canada	0.08%	Under Limit
Australia	0.05%	Under Limit
Germany	0.05%	Under Limit
France	0.05%	Under Limit
Japan	0.03%	Under Limit
Sweden	0.02%	Under Limit
Norway	0.02%	Under Limit
Poland	0.02%	Under Limit

How This Was Calculated

Widmark Formula:

BAC = (Alcohol in grams / (Body weight in grams x r)) - (0.015 x hours)

Alcohol consumed: 3 x 12oz x 5% ABV = 42.0g

Widmark r factor (male): 0.68

Raw BAC (before metabolism): 0.001%

Metabolized (2.0h x 0.015): 0.030%

Estimated BAC: 0.000%