{
  "id": "sticks-of-butter-to-cups",
  "version": "680aefa4398e",
  "status": "published",
  "name": "Sticks of butter to Cups Converter",
  "question": "Sticks of butter to cups converter",
  "summary": "Converts sticks of butter (stick) to cups (cup) and back, with the exact unit definitions.",
  "category": "convert",
  "subcategory": "cooking",
  "url": "https://www.acalculator.org/convert/sticks-of-butter-to-cups",
  "markdown": "https://www.acalculator.org/convert/sticks-of-butter-to-cups.md",
  "kind": "formulas",
  "method": "cup = stick × 0.5",
  "assumptions": [
    "1 stick of butter = 0.5 cups, from the exact definitions in NIST SP 811.",
    "Cups, ounces, tablespoons, teaspoons, pints, quarts, and gallons are US customary units: 1 US cup is 8 US fluid ounces.",
    "Exact on the typed decimals: at most 6 decimal places (6 significant digits below 0.0001), rounded half up."
  ],
  "inputs": {
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "type": "object",
    "properties": {
      "value": {
        "title": "Sticks of butter (stick)",
        "description": "The amount in sticks of butter to convert.",
        "type": "number",
        "minimum": 0,
        "maximum": 1000000000000
      },
      "result": {
        "title": "Cups (cup)",
        "description": "The same amount in cups.",
        "type": "number",
        "minimum": 0,
        "maximum": 500000000000
      }
    }
  },
  "solve": {
    "fillAny": 1,
    "variables": [
      "value",
      "result"
    ],
    "inputsOnly": []
  },
  "outputs": {
    "value": {
      "label": "Sticks of butter (stick)",
      "description": "The amount in sticks of butter to convert.",
      "format": "number"
    },
    "result": {
      "label": "Cups (cup)",
      "description": "The amount in cups.",
      "format": "number"
    },
    "amount": {
      "label": "Amount",
      "description": "The amount in sticks of butter, as the fraction when it is the page's value.",
      "format": "text"
    }
  },
  "defaultAnswer": {
    "inputs": {
      "value": 1
    },
    "outputs": {
      "result": 0.5,
      "amount": "1 stick"
    },
    "text": "1 stick = 0.5 cups."
  },
  "examples": [
    {
      "given": {
        "value": 1
      },
      "expect": {
        "result": 0.5
      },
      "source": "exact unit definitions in NIST SP 811 (2008), Appendix B.8"
    },
    {
      "given": {
        "value": 3
      },
      "expect": {
        "result": 1.5
      },
      "source": "exact unit definitions in NIST SP 811 (2008), Appendix B.8"
    },
    {
      "given": {
        "result": 1.5
      },
      "expect": {
        "value": 3
      },
      "source": "exact unit definitions in NIST SP 811 (2008), Appendix B.8"
    }
  ],
  "sources": [
    "NIST SP 811 (2008), Guide for the Use of the International System of Units, Table 5 (SI prefixes) and Appendix B.8 (factors for units listed alphabetically), retrieved 2026-10-05. https://www.nist.gov/pml/special-publication-811",
    "USDA FoodData Central, SR Legacy 173410, Butter, salted: portions 1 stick = 113 g, 1 tablespoon = 14.2 g, 1 cup = 227 g, retrieved 2026-10-05. https://fdc.nal.usda.gov/food-details/173410/nutrients"
  ],
  "related": [
    "oz-to-cups",
    "tablespoons-to-cups",
    "ml-to-cups",
    "quarts-to-cups",
    "cups-to-oz"
  ],
  "changelog": []
}