Blood Alcohol Calculator We are all different â A BAC calculation is just an estimate. The most accurate measuring tools are a blood test or a Breathalyzer. 0.00-0.03% â No impairment, normal behavior 0.03-0.06% â Mild impairment and euphoria, diminished inhibitions 0.06-0.10% â Worsening impairment, euphoria, buzzed 0.10-0.20% â Loss of motor control Alcohol By Volume ABV or Alcohol by volume is
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