BAC Calculator

Name: ToolPilot Global Technologies
Address: US
Price range: $0

Calculate estimated Blood Alcohol Content (BAC) and time to sobriety.

Unit System

Gender

Body Weight (kg)

Standard Drinks Consumed

drinks

1 drink = 12oz beer (5%), 5oz wine (12%), or 1.5oz shot (40%)

Hours Elapsed Since First Drink

hrs

Blood Alcohol Content Result

Status:Mild Impairment

0.052%

Estimated Time to 0.00% BAC3.5 hours

Driving StatusILLEGAL / UNSAFE TO DRIVE

MethodWidmark Formula

Noticeable loss of coordination and reasoning. Driving discouraged.

Medical & Health DisclaimerThis calculator provides general educational estimates based on standard health formulas. Results are for informational purposes only and are not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider regarding a medical condition.

Widmark BAC Formula

BAC = [ Alcohol (g) / (Weight (g) × r) ] × 100 - (0.015 × Hours)

Calculates blood alcohol concentration based on body weight, gender distribution factor r, and time elapsed.

Variables Defined

Gender factor r:0.68 for males, 0.55 for females.
Metabolism Rate:Body metabolizes ~0.015% BAC per hour.

Example BAC Calculation

A 80 kg male consuming 3 standard drinks over 2 hours.

Given Inputs

Alcohol in grams (3 × 14g):42 grams
Body fluid (80,000g × 0.68):54,400g
Peak BAC:(42 / 54,400) × 100 = 0.077%
Metabolized in 2 hours:0.077% - (0.015 × 2) = 0.047%

Calculation ResultEstimated BAC = 0.047% (Mild Impairment)

Frequently Asked Questions about BAC Calculator

BAC Calculator

Calculate estimated Blood Alcohol Content (BAC) and time to sobriety.

Unit System

Gender

Body Weight (kg)

Standard Drinks Consumed

drinks

1 drink = 12oz beer (5%), 5oz wine (12%), or 1.5oz shot (40%)

Hours Elapsed Since First Drink

hrs

Blood Alcohol Content Result

Status:Mild Impairment

0.052%

Estimated Time to 0.00% BAC3.5 hours

Driving StatusILLEGAL / UNSAFE TO DRIVE

MethodWidmark Formula

Noticeable loss of coordination and reasoning. Driving discouraged.

Widmark BAC Formula

BAC = [ Alcohol (g) / (Weight (g) × r) ] × 100 - (0.015 × Hours)

Calculates blood alcohol concentration based on body weight, gender distribution factor r, and time elapsed.

Variables Defined

Gender factor r:0.68 for males, 0.55 for females.
Metabolism Rate:Body metabolizes ~0.015% BAC per hour.

Example BAC Calculation

A 80 kg male consuming 3 standard drinks over 2 hours.

Given Inputs

Alcohol in grams (3 × 14g):42 grams
Body fluid (80,000g × 0.68):54,400g
Peak BAC:(42 / 54,400) × 100 = 0.077%
Metabolized in 2 hours:0.077% - (0.015 × 2) = 0.047%

Calculation ResultEstimated BAC = 0.047% (Mild Impairment)

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Example BAC Calculation

Given Inputs

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Widmark BAC Formula

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Example BAC Calculation

Given Inputs

Frequently Asked Questions about BAC Calculator

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Widmark BAC Formula

Variables Defined

Example BAC Calculation

Given Inputs

Frequently Asked Questions about BAC Calculator

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Blood Alcohol Content Result

Widmark BAC Formula

Variables Defined

Example BAC Calculation

Given Inputs

Frequently Asked Questions about BAC Calculator

What is the legal BAC limit for driving?

Can coffee or a cold shower sober you up faster?