How this calculator works
Pure alcohol mass is estimated with ethanol density 0.789 g/mL at room temperature. Divide by 13.45 g for a Canadian standard drink, 14 g for a US drink, or 10 g for Australia or New Zealand. The result can be fractional. Standard serving illustrations are rounded, so a bottle described as one standard drink may calculate very slightly above or below one. Add beer, wine, spirits or cocktail ingredients in separate rows using their actual volumes and strengths. This calculator measures alcohol quantity and does not calculate impairment or permission to drive. The result is an estimate for information only and is not medical advice.
Formula
Alcohol in grams = sum of volume in mL x ABV fraction x servings x 0.789. Standard drinks = alcohol in grams / grams per standard drink. Beverage mL = standard drinks x grams per drink / (0.789 x ABV fraction).
Worked example
A 341 mL beer at 5% contains about 13.45 g alcohol: approximately 1 Canadian, 0.96 US or 1.35 Australian standard drinks. A 750 mL wine at 12% contains 71.01 g: 5.28 Canadian or 5.07 US drinks.
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Frequently asked questions
Is one serving one standard drink?
Not necessarily. A large pour or a stronger product can contain several standard drinks. Check both volume and ABV.
Why are Canada and the US separate?
Their reference masses differ. Combining them would give an incorrect count for at least one country.
Can I enter a cocktail name?
Recipes vary too much for a name to establish alcohol content. Enter known alcoholic ingredients separately, including more than one measure when appropriate.