{
  "id": "standard-drink",
  "version": "ee3c41593166",
  "status": "published",
  "name": "Standard Drink Calculator",
  "question": "How many standard drinks is this?",
  "summary": "Computes how many US standard drinks (0.6 fl oz or about 14 g of pure alcohol each) a drink holds, from its volume and alcohol by volume, for one drink or several.",
  "category": "health",
  "subcategory": "nutrition",
  "url": "https://www.acalculator.org/health/standard-drink-calculator",
  "markdown": "https://www.acalculator.org/health/standard-drink-calculator.md",
  "kind": "function",
  "method": "Pure alcohol = drink size × ABV ÷ 100 × number of drinks; standard drinks = pure alcohol ÷ 0.6 fl oz; grams ≈ standard drinks × 14.",
  "assumptions": [
    "A US standard drink holds 0.6 fl oz (about 14 g) of pure alcohol (NIAAA). Other countries define a standard drink differently, for example 10 g in Australia.",
    "The ABV is the one on the label; mixed drinks add up each pour separately."
  ],
  "inputs": {
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "type": "object",
    "properties": {
      "v": {
        "title": "Drink size",
        "description": "How much liquid one drink, can, glass or bottle holds.",
        "type": [
          "number",
          "string"
        ],
        "x-quantity": "volume",
        "exclusiveMinimum": 0,
        "maximum": 0.1
      },
      "abv": {
        "title": "Alcohol by volume (ABV)",
        "description": "The alcohol content printed on the label, as a percent of the volume.",
        "type": "number",
        "x-unit": "percent",
        "minimum": 0,
        "maximum": 100
      },
      "n": {
        "title": "Number of drinks",
        "description": "How many of these drinks.",
        "type": "integer",
        "minimum": 1,
        "maximum": 1000
      }
    }
  },
  "outputs": {
    "drinks": {
      "label": "Standard drinks",
      "description": "Pure alcohol in all the drinks ÷ 0.6 fl oz, the alcohol in one US standard drink.",
      "format": "number"
    },
    "each": {
      "label": "Standard drinks in one",
      "description": "Standard drinks in one of these drinks.",
      "format": "number"
    },
    "alcoholFlOz": {
      "label": "Pure alcohol (fl oz)",
      "description": "Drink size × ABV × number of drinks, in US fluid ounces.",
      "format": "number"
    },
    "alcoholMl": {
      "label": "Pure alcohol (mL)",
      "description": "The same pure alcohol in millilitres.",
      "format": "number"
    },
    "grams": {
      "label": "Pure alcohol (grams, about)",
      "description": "Standard drinks × 14 g, NIAAA’s weight of one standard drink.",
      "format": "number"
    }
  },
  "defaultAnswer": {
    "inputs": {
      "v": 0.00035488235475000004,
      "abv": 5,
      "n": 1
    },
    "outputs": {
      "drinks": 1,
      "each": 1,
      "alcoholFlOz": 0.6,
      "alcoholMl": 17.7441177375,
      "grams": 14
    },
    "text": "US standard drinks: 1, with 0.6 fl oz of pure alcohol."
  },
  "examples": [
    {
      "given": {
        "v": 0.00035488235475000004,
        "abv": 5,
        "n": 1
      },
      "expect": {
        "drinks": 1,
        "alcoholFlOz": 0.6,
        "grams": 14
      },
      "source": "NIAAA, What Is A Standard Drink? (a US standard drink holds about 14 g, or 0.6 fl oz, of pure alcohol; 12 fl oz beer at 5%, 5 fl oz wine at 12%, 1.5 fl oz spirits at 40%). https://www.niaaa.nih.gov/alcohols-effects-health/what-standard-drink; hand calculation in content.mdx: 12 × 0.05 = 0.6 fl oz = 1 drink"
    },
    {
      "given": {
        "v": 0.0001478676478125,
        "abv": 12,
        "n": 1
      },
      "expect": {
        "drinks": 1,
        "alcoholFlOz": 0.6
      },
      "source": "NIAAA, What Is A Standard Drink? (a US standard drink holds about 14 g, or 0.6 fl oz, of pure alcohol; 12 fl oz beer at 5%, 5 fl oz wine at 12%, 1.5 fl oz spirits at 40%). https://www.niaaa.nih.gov/alcohols-effects-health/what-standard-drink; hand calculation in content.mdx: 5 × 0.12 = 0.6 fl oz = 1 drink"
    },
    {
      "given": {
        "v": 0.000044360294343750005,
        "abv": 40,
        "n": 3
      },
      "expect": {
        "drinks": 3,
        "each": 1,
        "alcoholFlOz": 1.8
      },
      "source": "NIAAA, What Is A Standard Drink? (a US standard drink holds about 14 g, or 0.6 fl oz, of pure alcohol; 12 fl oz beer at 5%, 5 fl oz wine at 12%, 1.5 fl oz spirits at 40%). https://www.niaaa.nih.gov/alcohols-effects-health/what-standard-drink; hand calculation in content.mdx: 1.5 × 0.40 = 0.6 fl oz = 1 drink each, × 3 = 3"
    },
    {
      "given": {
        "v": 0.00075,
        "abv": 13.5,
        "n": 1
      },
      "expect": {
        "drinks": 5.7061163309360055,
        "alcoholMl": 101.25
      },
      "source": "NIAAA, What Is A Standard Drink? (a US standard drink holds about 14 g, or 0.6 fl oz, of pure alcohol; 12 fl oz beer at 5%, 5 fl oz wine at 12%, 1.5 fl oz spirits at 40%). https://www.niaaa.nih.gov/alcohols-effects-health/what-standard-drink; NIST Handbook 44 (2026), Appendix C (1 fl oz = 29.5735295625 mL); hand calculation in content.mdx: 750 × 0.135 = 101.25 mL ÷ 17.7441177375 mL = 5.71 drinks"
    }
  ],
  "sources": [
    "National Institute on Alcohol Abuse and Alcoholism (NIAAA), What Is A Standard Drink? (about 14 grams, or 0.6 fluid ounces, of pure alcohol; 12 fl oz beer at 5%, 5 fl oz wine at 12%, 1.5 fl oz distilled spirits at 40%). https://www.niaaa.nih.gov/alcohols-effects-health/what-standard-drink (retrieved 2026-10-02)",
    "NIST Handbook 44 (2026), Appendix C, General Tables of Units of Measurement: 1 US gallon = 231 in³ = 3.785411784 L; 1 fl oz = 1/128 gallon. https://www.nist.gov/document/2026-nist-handbook-44-appendix-c (retrieved 2026-10-02)"
  ],
  "related": [
    "caffeine",
    "calorie"
  ],
  "changelog": []
}