Using the BAC Calculator responsibly
Page-specific guidance based on this calculator’s implemented method, inputs, and known limits.
What this result is useful for
The BAC calculator illustrates a Widmark-style population estimate from alcohol amount, body weight, sex distribution factor, and elapsed time. It is included for education about uncertainty and impairment, not to decide whether it is safe or legal to drive.
Assumptions and limits
Absorption and elimination vary with beverage strength, pour size, food, time, medications, health, and individual physiology. The estimate cannot measure current impairment and may be materially wrong. Legal limits also vary by place, age, licence, and activity.
How to check the result
Verify beverage volumes and alcohol percentages, and treat every result as uncertain. Do not drive, operate machinery, supervise safety-critical work, or delay emergency help based on this output. Only an appropriate breath or blood test can measure alcohol concentration at a point in time.