Celtic Kane

Blood Alcohol Content (BAC) Calculator

Determine Your Tolerance Results
  • Your estimated BAC is not available yet
  • Your estimated time to drive is not available yet
  • Your estimated time until sober is not available yet
Metabolic rate:
Elapsed time: hrs
Determined Total Consumed Alcohol
Percent alcohol: %
Total servings:
Alcohol History
[no alcohol added]

Purchase a Breathalyzer

BACtrack S80 Pro Breathalyzer Professional Edition

This online BAC calculator is good for estimating your BAC level, but your actual BAC will vary depending on a host of different factors, such as your hydration status, recent meals, fluid intake, kidney function, and much more. If you’re interested in buying a breathalyzer to get a more accurate estimation, I would highly suggest the model listed to the right.

Buy a Breathalyzer at Breathalyzer.net

BAC Chart Values
0.00 – 0.03% Normal behavior, no impairment
0.03 – 0.06% Mild euphoria and impairment; decreased inhibitions
0.06 – 0.10% Buzzed, euphoric, increased impairment
0.10 – 0.20% Drunk, emotional swings, slurred speech, nausea, loss of reaction time and motor control
0.20 – 0.30% Confused, nauseated, poor mentation, blackout
0.30 – 0.40% Possibly unconscious, unarrousable, loss of bladder function, risk of death
Above 0.40% Unconscious, coma, impaired breathing, risk of death

Important Notes

  • If you’re typing in a custom percent alcohol, remember that the proof of an alcohol is double the percent (e.g. 80 proof alcohol is 40%)
  • If you’re entering a mixed drink, only count the number of shots you put in (not the drink’s total volume)
  • Everyone is different — BAC calculators are merely an estimate. A breathalyzer or blood test is the only way to have an accurate measurement.
  • This calculator assumes the legal limit for driving is 0.08% and 21 years old. Please note that the legal limit for driving may vary depending on state/country and your age.
  • All calculations are based on the US Department of Transportation.

115 Responses to “Blood Alcohol Content (BAC) Calculator”

  1. michele says:

    Thank you for your feedback and this tool. It has brought me some sense of responsibility.

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