{
  "id": "8-oz-pasta-to-cups",
  "version": "b7b0717dc7d7",
  "status": "published",
  "name": "8 oz of pasta to cups",
  "question": "What is 8 oz of pasta to cups?",
  "summary": "Converts ounces of pasta to cups and back, from the weight of 1 cup (dry pasta, elbows: 122 g).",
  "category": "convert",
  "subcategory": "cooking",
  "url": "https://www.acalculator.org/convert/8-oz-pasta-to-cups",
  "markdown": "https://www.acalculator.org/convert/8-oz-pasta-to-cups.md",
  "kind": "formulas",
  "method": "cups = oz × 28.349523125 ÷ 122, where grams per cup depends on the ingredient (dry pasta, elbows: 122 g)",
  "assumptions": [
    "Grams per cup are USDA FoodData Central (SR Legacy) portion weights for one level US cup (8 US fluid ounces): all-purpose flour 125 g (FDC 168894), granulated sugar 200 g (FDC 169655), brown sugar, packed 220 g (FDC 168833), powdered sugar, unsifted 120 g (FDC 169656), whole milk 244 g (FDC 171265), butter 227 g (FDC 173410), olive oil 216 g (FDC 171413), honey 339 g (FDC 169640), white rice, uncooked 185 g (FDC 169756), dry pasta, elbows 122 g (FDC 169736).",
    "Ounces here are avoirdupois ounces, a weight: 1 oz = 1/16 lb = 28.349523125 g. A US fluid ounce is a volume.",
    "Water is pure water: 0.999975 kg per liter at 4 °C and 0.998207 kg per liter at 20 °C, from the Tanaka et al. (2001) density formula.",
    "How you fill the cup changes the weight: packed, sifted, or scooped flour can differ by 20% or more.",
    "Exact on the typed decimals: at most 6 decimal places (6 significant digits below 0.0001), rounded half up; an answer of 1 billion or more shows at most 15 significant digits."
  ],
  "inputs": {
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "type": "object",
    "properties": {
      "value": {
        "title": "Ounces (oz)",
        "description": "The amount in ounces to convert.",
        "type": "number",
        "minimum": 0,
        "maximum": 1000000000000
      },
      "result": {
        "title": "Cups (cup)",
        "description": "The same amount in cups.",
        "type": "number",
        "minimum": 0,
        "maximum": 236246026041.66666
      },
      "ingredient": {
        "title": "Ingredient",
        "description": "What you are measuring. A cup of flour weighs less than a cup of water.",
        "type": "string",
        "enum": [
          "flour",
          "sugar",
          "brown-sugar",
          "powdered-sugar",
          "water",
          "water-20c",
          "milk",
          "butter",
          "olive-oil",
          "honey",
          "rice",
          "pasta"
        ]
      }
    }
  },
  "solve": {
    "fillAny": 1,
    "variables": [
      "value",
      "result"
    ],
    "inputsOnly": []
  },
  "outputs": {
    "value": {
      "label": "Ounces (oz)",
      "description": "The amount in ounces to convert.",
      "format": "number"
    },
    "result": {
      "label": "Cups (cup)",
      "description": "The amount in cups.",
      "format": "number"
    }
  },
  "defaultAnswer": {
    "inputs": {
      "ingredient": "pasta",
      "value": 8
    },
    "outputs": {
      "result": 1.8589851229508196
    },
    "text": "8 oz = 1.858985 cups (Dry pasta, elbows, 122 g per cup)."
  },
  "examples": [
    {
      "given": {
        "value": 8,
        "ingredient": "butter"
      },
      "expect": {
        "result": 0.9991021365638767
      },
      "source": "USDA FoodData Central SR Legacy 173410: 1 cup = 227 g"
    },
    {
      "given": {
        "value": 16,
        "ingredient": "sugar"
      },
      "expect": {
        "result": 2.26796185
      },
      "source": "USDA FoodData Central SR Legacy 169655: 1 cup = 200 g"
    },
    {
      "given": {
        "value": 2,
        "ingredient": "pasta"
      },
      "expect": {
        "result": 0.4647462807377049
      },
      "source": "USDA FoodData Central SR Legacy 169736: 1 cup = 122 g"
    },
    {
      "given": {
        "value": 8,
        "ingredient": "pasta"
      },
      "expect": {
        "result": 1.8589851229508196
      },
      "source": "USDA FoodData Central SR Legacy 169736: 1 cup = 122 g"
    }
  ],
  "sources": [
    "USDA FoodData Central, SR Legacy 169736, Pasta, dry, enriched: portions 1 cup elbows = 122 g, shells 64 g, farfalle 81 g, lasagna 90 g, spaghetti 91 g, penne 95 g, rotini 96 g, retrieved 2026-10-19. https://fdc.nal.usda.gov/food-details/169736/nutrients",
    "USDA FoodData Central, SR Legacy portion weights for 1 cup: FDC 168894 all-purpose flour 125 g; FDC 169655 granulated sugar 200 g; FDC 168833 brown sugar, packed 220 g; FDC 169656 powdered sugar, unsifted 120 g; FDC 171265 whole milk 244 g; FDC 173410 butter 227 g; FDC 171413 olive oil 216 g; FDC 169640 honey 339 g; FDC 169756 white rice, uncooked 185 g. https://fdc.nal.usda.gov/",
    "Tanaka, M. et al. (2001), Recommended table for the density of water between 0 °C and 40 °C based on recent experimental reports, Metrologia 38, 301–309: pure water 999.9749 kg/m³ at 4 °C and 998.2067 kg/m³ at 20 °C. https://doi.org/10.1088/0026-1394/38/4/3",
    "NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B.8: Factors for Units Listed Alphabetically (bold factors are exact), retrieved 2026-10-18. https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8",
    "NIST SP 811 (2008), footnotes to Appendix B: 1 lb = 0.45359237 kg exactly (footnote 22); 1 lbf = 4.4482216152605 N exactly with standard gravity, 9.80665 m/s² (footnote 23), retrieved 2026-10-18. https://www.nist.gov/pml/special-publication-811/nist-guide-si-footnotes"
  ],
  "related": [
    "oz-to-cups",
    "2-oz-pasta-to-cups",
    "cups-to-oz"
  ],
  "changelog": []
}