Convert any alcoholic beverage to standard drinks (US, UK, AU, CA). Calculate pure alcohol grams, calories, metabolism time, and compare 15+ common drink types.
A "standard drink" is a fixed amount of pure alcohol, but the definition varies dramatically by country — 14 grams in the US, 8 grams in the UK, 10 grams in Australia. Many popular drinks contain far more alcohol than one standard drink: a 16-oz craft IPA at 7% ABV contains nearly 2 US standard drinks, and a typical Long Island Iced Tea exceeds 3. Misunderstanding serving sizes is a leading cause of unintentional overconsumption.
This calculator converts any beverage — by ABV and volume — into precise standard drink equivalents for multiple countries, grams of pure alcohol, alcohol-only calories, and estimated metabolism time. It includes 15 common drink presets for instant comparison, from light beer to cask-strength whiskey to cocktails, revealing the often-surprising alcohol content hiding in familiar drinks.
Understanding standard drinks is essential for tracking consumption against health guidelines (NIAAA low-risk limits: ≤ 2/day for men, ≤ 1/day for women), recognizing binge drinking thresholds (4-5+ drinks in 2 hours), estimating BAC and sobriety timing, and making informed decisions about alcohol's caloric and health impact.
Most people dramatically underestimate their alcohol consumption because they think in "drinks" (one glass, one bottle) rather than standard units. A large wine pour is 1.5-2 standard drinks. A craft beer tallboy is nearly 2. This calculator removes the guesswork, revealing the actual alcohol content so you can make informed decisions about health, driving, and compliance with medical guidelines.
Alcohol (mL) = Volume (oz) × 29.5735 × ABV/100 Alcohol (grams) = Alcohol (mL) × 0.789 g/mL US Standard Drinks = Alcohol (grams) / 14 UK Units = Alcohol (grams) / 8 Calories from alcohol = grams × 7 kcal/g
Result: 3.74 US standard drinks, 52.4 g pure alcohol, 367 kcal
Two pints of 7% IPA: 32 oz × 29.57 mL/oz × 0.07 ABV × 0.789 g/mL = 52.4 g alcohol. At 14 g per US standard drink, that is 3.74 standard drinks — nearly double what most people assume for "two beers." At 7 kcal/g, the alcohol alone contributes 367 calories.
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Most mistakes come from mixed standards, rounding too early, or misread labels. Recheck final values before use. ## Practical Notes
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Each country chose its standard independently based on different public health traditions. The US (14g) based its standard on typical beer/wine/spirit serving sizes. The UK (8g) chose a smaller unit for easier arithmetic. Australia (10g) and most of Europe use 10g for simplicity. Japan uses 19.75g.
Alcohol itself provides 7 kcal/g, making one US standard drink (14g) = 98 calories from alcohol alone. Beer and wine add carbohydrate calories (a 12-oz beer is ~150-200 total calories). Spirits with zero-sugar mixers have only alcohol calories (~100 kcal per shot).
NIAAA defines binge drinking as 4+ standard drinks for women or 5+ for men within about 2 hours. This typically raises BAC to 0.08% or above. However, even 3 drinks can impair judgment and coordination. Binge drinking is the most harmful drinking pattern.
The average person metabolizes approximately one standard drink per hour (range: 0.75–1.5 drinks/hour). This rate is essentially constant regardless of body size or tolerance. Three standard drinks take about 3 hours. Coffee, cold showers, and exercise do not speed this up.
No. A regular 12-oz, 5% beer is approximately 1 standard drink. But a 16-oz craft IPA at 7% is 1.87 standard drinks. A 22-oz bomber of 9% stout is 3.3 standard drinks. A 40-oz malt liquor at 8% is 5.3 standard drinks. Always check ABV and volume.
US NIAAA: ≤ 2 drinks/day for men, ≤ 1 for women, and no more than 14/week (men) or 7/week (women). Canada (2023): ≤ 2 drinks/week for minimal risk. UK: ≤ 14 units/week. Any amount of alcohol carries some health risk.