{"success":true,"version":"v1","request":{"tool":"get_calculator_schema","calculator_id":"standard-drinks"},"result":{"entity_type":"calculator","id":"standard-drinks","calculator_id":"standard-drinks","canonical_url":"https://tttkmbb.com/health/standard-drinks","name":"Standard Drinks Calculator","title":"Standard Drinks Calculator – Alcohol Grams, US/AU/EU Standard Drinks and UK Units","category":"health","category_name":"Health","tool_name":"calculate_standard_drinks","featured_mcp_tool":false,"description":"Converts a beverage's volume and alcohol by volume into grams of pure alcohol (ethanol density 0.789 g/mL) and expresses it as standard drinks of the US (14 g), Australia and WHO/EU (10 g), Canada (13.45 g) and Japan (20 g), UK units (volume × ABV / 1000), and the calories from alcohol (7 kcal/g).","use_when":"You need to count standard drinks or UK units for a drink of known size and strength, convert between national standard-drink definitions, or get the alcohol calories of a beverage.","do_not_use_when":"You want an estimate of blood alcohol concentration (use bac-widmark) or the ABV of a cocktail; the result is informational only and must not be used to decide whether to drive.","inputs":[{"name":"volume_ml","label":"Volume per serving","type":"number","unit":"mL","required":true,"max":5000,"exclusive_min":0,"description":"Volume of one serving in millilitres (330 mL can, 568 mL UK pint, 150 mL wine glass, 44 mL US shot).","example":500},{"name":"abv_percent","label":"Alcohol by volume","type":"number","unit":"%","required":true,"min":0,"max":100,"description":"Alcohol strength in percent by volume (ABV), e.g. 5 for lager, 13.5 for wine, 40 for spirits.","example":5},{"name":"servings","label":"Servings","type":"number","required":false,"default":1,"max":100,"exclusive_min":0,"description":"Number of servings consumed.","example":1}],"outputs":[{"name":"alcohol_grams","label":"Pure alcohol","type":"number","unit":"g","decimals":2,"description":"Grams of ethanol in all servings (alcohol_ml × 0.789)."},{"name":"alcohol_ml","label":"Pure alcohol","type":"number","unit":"mL","decimals":2,"description":"Millilitres of ethanol in all servings."},{"name":"standard_drinks_us","label":"US standard drinks (14 g)","type":"number","decimals":2,"description":"Alcohol grams / 14 (NIAAA definition)."},{"name":"standard_drinks_au","label":"Australian standard drinks (10 g)","type":"number","decimals":2,"description":"Alcohol grams / 10 (NHMRC definition)."},{"name":"units_uk","label":"UK units","type":"number","decimals":2,"description":"volume_ml × abv_percent / 1000 × servings (NHS formula; 1 unit = 10 mL ≈ 8 g of alcohol)."},{"name":"standard_drinks_eu_who","label":"WHO / EU standard drinks (10 g)","type":"number","decimals":2,"description":"Alcohol grams / 10; the WHO reference definition, also used by many European countries (national definitions range from 8 to 20 g)."},{"name":"standard_drinks_canada","label":"Canadian standard drinks (13.45 g)","type":"number","decimals":2,"description":"Alcohol grams / 13.45 (17.05 mL of ethanol)."},{"name":"standard_drinks_japan","label":"Japanese standard drinks (20 g)","type":"number","decimals":2,"description":"Alcohol grams / 20."},{"name":"calories_from_alcohol","label":"Calories from alcohol","type":"number","unit":"kcal","decimals":0,"description":"Alcohol grams × 7 kcal; excludes sugars and other carbohydrates in the drink."}],"input_schema":{"type":"object","properties":{"volume_ml":{"description":"Volume of one serving in millilitres (330 mL can, 568 mL UK pint, 150 mL wine glass, 44 mL US shot). Unit: mL.","type":"number","maximum":5000,"exclusiveMinimum":0,"examples":[500],"x-unit":"mL"},"abv_percent":{"description":"Alcohol strength in percent by volume (ABV), e.g. 5 for lager, 13.5 for wine, 40 for spirits. Unit: %.","type":"number","minimum":0,"maximum":100,"examples":[5],"x-unit":"%"},"servings":{"description":"Number of servings consumed.","type":"number","maximum":100,"exclusiveMinimum":0,"default":1,"examples":[1]}},"additionalProperties":false,"required":["volume_ml","abv_percent"]},"output_schema":{"type":"object","properties":{"alcohol_grams":{"description":"Grams of ethanol in all servings (alcohol_ml × 0.789). Unit: g.","type":"number","x-unit":"g"},"alcohol_ml":{"description":"Millilitres of ethanol in all servings. Unit: mL.","type":"number","x-unit":"mL"},"standard_drinks_us":{"description":"Alcohol grams / 14 (NIAAA definition).","type":"number"},"standard_drinks_au":{"description":"Alcohol grams / 10 (NHMRC definition).","type":"number"},"units_uk":{"description":"volume_ml × abv_percent / 1000 × servings (NHS formula; 1 unit = 10 mL ≈ 8 g of alcohol).","type":"number"},"standard_drinks_eu_who":{"description":"Alcohol grams / 10; the WHO reference definition, also used by many European countries (national definitions range from 8 to 20 g).","type":"number"},"standard_drinks_canada":{"description":"Alcohol grams / 13.45 (17.05 mL of ethanol).","type":"number"},"standard_drinks_japan":{"description":"Alcohol grams / 20.","type":"number"},"calories_from_alcohol":{"description":"Alcohol grams × 7 kcal; excludes sugars and other carbohydrates in the drink. Unit: kcal.","type":"number","x-unit":"kcal"}}},"formula":"alcohol_ml = volume_ml × abv_percent / 100 × servings; alcohol_grams = alcohol_ml × 0.789; standard_drinks_us = alcohol_grams / 14; standard_drinks_au = standard_drinks_eu_who = alcohol_grams / 10; standard_drinks_canada = alcohol_grams / 13.45; standard_drinks_japan = alcohol_grams / 20; units_uk = volume_ml × abv_percent / 1000 × servings; calories_from_alcohol = alcohol_grams × 7","method":"Ethanol density 0.789 g/mL at 20 °C. National standard-drink sizes are conventions for counting, not physiological thresholds; results are informational and must not be used to decide whether to drive.","sources":[{"name":"NIAAA – What Is a Standard Drink?","url":"https://www.niaaa.nih.gov/alcohols-effects-health/overview-alcohol-consumption/what-standard-drink","type":"government","retrieved_at":"2026-09-24"},{"name":"NHMRC – Australian guidelines to reduce health risks from drinking alcohol","url":"https://www.nhmrc.gov.au/health-advice/alcohol","type":"government","retrieved_at":"2026-09-24"},{"name":"NHS – Alcohol units","url":"https://www.nhs.uk/live-well/alcohol-advice/calculating-alcohol-units/","type":"government","retrieved_at":"2026-09-24"}],"freshness":{"type":"static","max_age_seconds":null,"note":"Deterministic formula with fixed constants; results never go stale. Inputs supplied by the caller determine the output."},"examples":[{"name":"500 mL beer at 5 %","inputs":{"volume_ml":500,"abv_percent":5},"expected":{"alcohol_grams":19.73,"alcohol_ml":25,"standard_drinks_us":1.41,"standard_drinks_au":1.97,"units_uk":2.5,"standard_drinks_canada":1.47,"standard_drinks_japan":0.99,"calories_from_alcohol":138},"url":"https://tttkmbb.com/api/v1/calculate/standard-drinks?volume_ml=500&abv_percent=5"},{"name":"750 mL wine at 13.5 %","inputs":{"volume_ml":750,"abv_percent":13.5,"servings":1},"expected":{"alcohol_grams":79.89,"standard_drinks_us":5.71,"standard_drinks_au":7.99,"units_uk":10.13,"calories_from_alcohol":559},"url":"https://tttkmbb.com/api/v1/calculate/standard-drinks?volume_ml=750&abv_percent=13.5&servings=1"}],"faq":[{"q":"Why is a UK unit not exactly 8 g?","a":"A UK unit is defined as 10 mL of pure alcohol, which weighs 7.89 g; the NHS formula volume × ABV / 1000 gives units directly from the label."},{"q":"Does 'servings' multiply everything?","a":"Yes. All outputs are totals for servings × volume_ml, so enter the single-serving volume and the number of servings."},{"q":"Are the calories the whole drink?","a":"No, only the 7 kcal per gram of ethanol. Beer, sweet wine, cider and mixers add carbohydrate calories that this calculator does not know."}],"tags":["standard drinks","alcohol units","grams of alcohol","abv to units","uk units","alcohol calories"],"related":[{"calculator_id":"bac-widmark","reason":"Estimate blood alcohol concentration from the number of standard drinks."},{"calculator_id":"tdee","reason":"See how the alcohol calories compare with daily energy needs."}],"links":{"html":"https://tttkmbb.com/health/standard-drinks","markdown":"https://tttkmbb.com/health/standard-drinks.md","json":"https://tttkmbb.com/health/standard-drinks.json","api":"https://tttkmbb.com/api/v1/calculate/standard-drinks","schema":"https://tttkmbb.com/api/v1/calculators/standard-drinks","openapi":"https://tttkmbb.com/openapi.json","mcp":"https://tttkmbb.com/mcp"},"version":"v1","updated_at":"2026-09-24"},"timestamp":"2026-09-24T03:46:10Z"}