🍷 Standard Drink Calculator

Pure alcohol (g) = Volume (ml) × ABV (%) ÷ 100 × 0.789 (ethanol density, g/ml). For example, a 355ml beer at 5% ABV contains 355 × 0.05 × 0.789 ≈ 14.0g of pure alcohol. Because different drinks (beer, wine, spirits) come in very different serving sizes even at similar ABV, comparing pure alcohol grams is more accurate than comparing "number of drinks."

Health authorities in different countries define a "standard drink" using different gram amounts: 14g in the US, 8g in the UK (1 unit), 10g in Australia, 13.45g in Canada, and 19.75g in Japan (1 gō). The same pure-alcohol amount can therefore translate into a different "number of standard drinks" depending on which country's guideline you use — always check the gram basis when reading international drinking guidelines.