{
  "entity_type": "unit_conversion_page",
  "id": "hours-to-years",
  "name": "Hours to Years (365 days)",
  "title": "Hours to Years (365 days) Converter (h to yr)",
  "description": "Convert hours to years (365 days): 1 h = 0.000114155 yr. 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": "h",
    "display": "h",
    "name": "hours",
    "singular": "hour"
  },
  "to_unit": {
    "symbol": "year_365",
    "display": "yr",
    "name": "years (365 days)",
    "singular": "year"
  },
  "linear": true,
  "factor": 0.0001141552511,
  "inverse_factor": 8760,
  "formula": "years (365 days) = hours × 0.0001141552511",
  "reverse_formula": "hours = years (365 days) × 8760",
  "unit_relation": "1 h = 0.000114155 yr",
  "examples": [
    {
      "value": 5,
      "result": 0.000570776,
      "text": "5 h = 0.000570776 yr"
    },
    {
      "value": 12.5,
      "result": 0.00142694,
      "text": "12.5 h = 0.00142694 yr"
    },
    {
      "value": 100,
      "result": 0.0114155,
      "text": "100 h = 0.0114155 yr"
    }
  ],
  "table": [
    {
      "h": 1,
      "year_365": 0.000114155
    },
    {
      "h": 2,
      "year_365": 0.000228311
    },
    {
      "h": 3,
      "year_365": 0.000342466
    },
    {
      "h": 4,
      "year_365": 0.000456621
    },
    {
      "h": 5,
      "year_365": 0.000570776
    },
    {
      "h": 6,
      "year_365": 0.000684932
    },
    {
      "h": 7,
      "year_365": 0.000799087
    },
    {
      "h": 8,
      "year_365": 0.000913242
    },
    {
      "h": 9,
      "year_365": 0.0010274
    },
    {
      "h": 10,
      "year_365": 0.00114155
    },
    {
      "h": 15,
      "year_365": 0.00171233
    },
    {
      "h": 20,
      "year_365": 0.00228311
    },
    {
      "h": 25,
      "year_365": 0.00285388
    },
    {
      "h": 30,
      "year_365": 0.00342466
    },
    {
      "h": 40,
      "year_365": 0.00456621
    },
    {
      "h": 50,
      "year_365": 0.00570776
    },
    {
      "h": 75,
      "year_365": 0.00856164
    },
    {
      "h": 100,
      "year_365": 0.0114155
    },
    {
      "h": 200,
      "year_365": 0.0228311
    },
    {
      "h": 250,
      "year_365": 0.0285388
    },
    {
      "h": 500,
      "year_365": 0.0570776
    },
    {
      "h": 1000,
      "year_365": 0.114155
    }
  ],
  "faq": [
    {
      "q": "How many years (365 days) are in one hour?",
      "a": "1 h = 0.000114155 yr. 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 hours to years (365 days)?",
      "a": "Multiply the value in hours by 0.0001141552511: years (365 days) = hours × 0.0001141552511. For example, 5 h = 0.000570776 yr."
    },
    {
      "q": "How do I convert years (365 days) back to hours?",
      "a": "Multiply by the inverse factor 8760 (hours = years (365 days) × 8760), or use the years (365 days)-to-hours 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=h&to_unit=year_365",
    "calculator": "https://tttkmbb.com/api/v1/calculate/time?value=5&from_unit=h&to_unit=year_365",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "h",
      "to_unit": "year_365"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/hours-to-years",
    "markdown": "https://tttkmbb.com/conversion/hours-to-years.md",
    "json": "https://tttkmbb.com/conversion/hours-to-years.json",
    "reverse": "https://tttkmbb.com/conversion/years-to-hours",
    "quantity_converter": "https://tttkmbb.com/conversion/time",
    "units": "https://tttkmbb.com/api/v1/units?quantity=time"
  },
  "timestamp": "2026-09-24"
}