Breathalyzer (Widmark BAC)
Log drinks with clock times to estimate blood-alcohol concentration (‰) at a chosen readout hour using the Widmark model.
Open calculatorAlcohol Units and Grams
Calculate pure ethyl alcohol in grams, standard drinks (10 g), and UK units. Select a beverage category (beer, wine, spirits, cider, cocktails) with realistic strengths and sizes, or build a multi-drink list to see total alcohol, calories, and estimated metabolism time.
Beverage category
Style and strength (% ABV)
Serving size (ml)
Volume of a single serving or bottle in millilitres (e.g. 500 ml for beer, 150 ml for wine, 40 ml for spirits).
ml
Alcohol concentration by volume (% ABV) as stated on the beverage label.
%
Standard drinks (10 g)
2
Pure ethanol
19.7 g
UK alcohol units
2.5
Total liquid volume
500 ml
Calories from pure alcohol
140 kcal
Estimated metabolism time
≈ 1 h 58 min
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Check BAC and sobriety timePure alcohol equivalents
1 standard drink = 10 g pure ethanol≈ 1beers (500 ml, 5%)
≈ 1.4wine glasses (150 ml, 12%)
≈ 1.6vodka shots (40 ml, 40%)
A standard 500 ml beer at 5% contains approx. 19.7 g of pure ethanol (about two standard drinks). The liver metabolises roughly 8–10 g of pure ethanol per hour in healthy adults. For estimated blood alcohol concentration and sobriety timeline, use the BAC Calculator.
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Educational estimate only. Not medical, tax, legal or financial advice.