{
  "entity_type": "unit_conversion_page",
  "id": "weeks-to-days",
  "name": "Weeks to Days",
  "title": "Weeks to Days Converter (wk to d)",
  "description": "Convert weeks to days: 1 wk = 7 d. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.",
  "quantity": "time",
  "quantity_name": "Time",
  "base_unit": "s",
  "from_unit": {
    "symbol": "week",
    "display": "wk",
    "name": "weeks",
    "singular": "week"
  },
  "to_unit": {
    "symbol": "day",
    "display": "d",
    "name": "days",
    "singular": "day"
  },
  "linear": true,
  "factor": 7,
  "inverse_factor": 0.1428571429,
  "formula": "days = weeks × 7",
  "reverse_formula": "weeks = days × 0.1428571429",
  "unit_relation": "1 wk = 7 d",
  "examples": [
    {
      "value": 5,
      "result": 35,
      "text": "5 wk = 35 d"
    },
    {
      "value": 12.5,
      "result": 87.5,
      "text": "12.5 wk = 87.5 d"
    },
    {
      "value": 100,
      "result": 700,
      "text": "100 wk = 700 d"
    }
  ],
  "table": [
    {
      "week": 1,
      "day": 7
    },
    {
      "week": 2,
      "day": 14
    },
    {
      "week": 3,
      "day": 21
    },
    {
      "week": 4,
      "day": 28
    },
    {
      "week": 5,
      "day": 35
    },
    {
      "week": 6,
      "day": 42
    },
    {
      "week": 7,
      "day": 49
    },
    {
      "week": 8,
      "day": 56
    },
    {
      "week": 9,
      "day": 63
    },
    {
      "week": 10,
      "day": 70
    },
    {
      "week": 15,
      "day": 105
    },
    {
      "week": 20,
      "day": 140
    },
    {
      "week": 25,
      "day": 175
    },
    {
      "week": 30,
      "day": 210
    },
    {
      "week": 40,
      "day": 280
    },
    {
      "week": 50,
      "day": 350
    },
    {
      "week": 75,
      "day": 525
    },
    {
      "week": 100,
      "day": 700
    },
    {
      "week": 200,
      "day": 1400
    },
    {
      "week": 250,
      "day": 1750
    },
    {
      "week": 500,
      "day": 3500
    },
    {
      "week": 1000,
      "day": 7000
    }
  ],
  "faq": [
    {
      "q": "How many days are in one week?",
      "a": "1 wk = 7 d. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures."
    },
    {
      "q": "What is the formula to convert weeks to days?",
      "a": "Multiply the value in weeks by 7: days = weeks × 7. For example, 5 wk = 35 d."
    },
    {
      "q": "How do I convert days back to weeks?",
      "a": "Multiply by the inverse factor 0.1428571429 (weeks = days × 0.1428571429), or use the days-to-weeks page."
    }
  ],
  "sources": [
    {
      "name": "NIST Special Publication 811 – Guide for the Use of the International System of Units (SI), Appendix B conversion factors",
      "url": "https://www.nist.gov/pml/special-publication-811",
      "type": "standard",
      "retrieved_at": "2026-09-24"
    },
    {
      "name": "BIPM – The International System of Units (SI Brochure, 9th edition)",
      "url": "https://www.bipm.org/en/publications/si-brochure",
      "type": "standard",
      "retrieved_at": "2026-09-24"
    },
    {
      "name": "Wikipedia – Conversion of units",
      "url": "https://en.wikipedia.org/wiki/Conversion_of_units",
      "type": "reference",
      "retrieved_at": "2026-09-24"
    }
  ],
  "freshness": {
    "type": "static",
    "max_age_seconds": null,
    "note": "Fixed conversion factors (NIST/BIPM definitions); results never go stale."
  },
  "api": {
    "convert": "https://tttkmbb.com/api/v1/convert?value=5&from_unit=week&to_unit=day",
    "calculator": "https://tttkmbb.com/api/v1/calculate/time?value=5&from_unit=week&to_unit=day",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "week",
      "to_unit": "day"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/weeks-to-days",
    "markdown": "https://tttkmbb.com/conversion/weeks-to-days.md",
    "json": "https://tttkmbb.com/conversion/weeks-to-days.json",
    "reverse": "https://tttkmbb.com/conversion/days-to-weeks",
    "quantity_converter": "https://tttkmbb.com/conversion/time",
    "units": "https://tttkmbb.com/api/v1/units?quantity=time"
  },
  "timestamp": "2026-09-24"
}