{
  "id": "cups-to-teaspoons",
  "version": "3479410ee518",
  "status": "published",
  "name": "Cups to Teaspoons Converter",
  "question": "How do I convert cups to teaspoons?",
  "summary": "Converts cups (cup) to teaspoons (tsp) and back, with the exact unit definitions.",
  "category": "convert",
  "subcategory": "cooking",
  "url": "https://www.acalculator.org/convert/cups-to-teaspoons",
  "markdown": "https://www.acalculator.org/convert/cups-to-teaspoons.md",
  "kind": "formulas",
  "method": "tsp = cup × 48",
  "assumptions": [
    "1 cup = 48 teaspoons, 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": "Cups (cup)",
        "description": "The amount in cups to convert.",
        "type": "number",
        "minimum": 0,
        "maximum": 1000000000000
      },
      "result": {
        "title": "Teaspoons (tsp)",
        "description": "The same amount in teaspoons.",
        "type": "number",
        "minimum": 0,
        "maximum": 48000000000000
      }
    }
  },
  "solve": {
    "fillAny": 1,
    "variables": [
      "value",
      "result"
    ],
    "inputsOnly": []
  },
  "outputs": {
    "value": {
      "label": "Cups (cup)",
      "description": "The amount in cups to convert.",
      "format": "number"
    },
    "result": {
      "label": "Teaspoons (tsp)",
      "description": "The amount in teaspoons.",
      "format": "number"
    }
  },
  "defaultAnswer": {
    "inputs": {
      "value": 1
    },
    "outputs": {
      "result": 48
    },
    "text": "1 cup = 48 tsp."
  },
  "examples": [
    {
      "given": {
        "value": 1
      },
      "expect": {
        "result": 48
      },
      "source": "exact unit definitions in NIST SP 811 (2008), Appendix B.8"
    },
    {
      "given": {
        "value": 0.25
      },
      "expect": {
        "result": 12
      },
      "source": "exact unit definitions in NIST SP 811 (2008), Appendix B.8"
    },
    {
      "given": {
        "result": 12
      },
      "expect": {
        "value": 0.25
      },
      "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",
    "NIST Office of Weights and Measures, Metric Kitchen: Cooking Measurement Equivalencies (1 teaspoon = 5 mL, 1 tablespoon = 15 mL), retrieved 2026-10-05. https://www.nist.gov/pml/owm/metric-kitchen-cooking-measurement-equivalencies"
  ],
  "related": [
    "teaspoons-to-cups",
    "oz-to-cups",
    "tablespoons-to-cups",
    "ml-to-cups",
    "quarts-to-cups"
  ],
  "changelog": []
}