{
  "entity_type": "unit_conversion_page",
  "id": "watts-to-hp",
  "name": "Watts to Horsepower (mechanical)",
  "title": "Watts to Horsepower (mechanical) Converter (W to hp)",
  "description": "Convert watts to horsepower (mechanical): 1 W = 0.00134102 hp. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.",
  "quantity": "power",
  "quantity_name": "Power",
  "base_unit": "W",
  "from_unit": {
    "symbol": "W",
    "display": "W",
    "name": "watts",
    "singular": "watt"
  },
  "to_unit": {
    "symbol": "hp",
    "display": "hp",
    "name": "horsepower (mechanical)",
    "singular": "horsepower"
  },
  "linear": true,
  "factor": 0.00134102209,
  "inverse_factor": 745.6998716,
  "formula": "horsepower (mechanical) = watts × 0.00134102209",
  "reverse_formula": "watts = horsepower (mechanical) × 745.6998716",
  "unit_relation": "1 W = 0.00134102 hp",
  "examples": [
    {
      "value": 5,
      "result": 0.00670511,
      "text": "5 W = 0.00670511 hp"
    },
    {
      "value": 12.5,
      "result": 0.0167628,
      "text": "12.5 W = 0.0167628 hp"
    },
    {
      "value": 100,
      "result": 0.134102,
      "text": "100 W = 0.134102 hp"
    }
  ],
  "table": [
    {
      "W": 1,
      "hp": 0.00134102
    },
    {
      "W": 2,
      "hp": 0.00268204
    },
    {
      "W": 3,
      "hp": 0.00402307
    },
    {
      "W": 4,
      "hp": 0.00536409
    },
    {
      "W": 5,
      "hp": 0.00670511
    },
    {
      "W": 6,
      "hp": 0.00804613
    },
    {
      "W": 7,
      "hp": 0.00938715
    },
    {
      "W": 8,
      "hp": 0.0107282
    },
    {
      "W": 9,
      "hp": 0.0120692
    },
    {
      "W": 10,
      "hp": 0.0134102
    },
    {
      "W": 15,
      "hp": 0.0201153
    },
    {
      "W": 20,
      "hp": 0.0268204
    },
    {
      "W": 25,
      "hp": 0.0335256
    },
    {
      "W": 30,
      "hp": 0.0402307
    },
    {
      "W": 40,
      "hp": 0.0536409
    },
    {
      "W": 50,
      "hp": 0.0670511
    },
    {
      "W": 75,
      "hp": 0.100577
    },
    {
      "W": 100,
      "hp": 0.134102
    },
    {
      "W": 200,
      "hp": 0.268204
    },
    {
      "W": 250,
      "hp": 0.335256
    },
    {
      "W": 500,
      "hp": 0.670511
    },
    {
      "W": 1000,
      "hp": 1.34102
    }
  ],
  "faq": [
    {
      "q": "How many horsepower (mechanical) are in one watt?",
      "a": "1 W = 0.00134102 hp. 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 watts to horsepower (mechanical)?",
      "a": "Multiply the value in watts by 0.00134102209: horsepower (mechanical) = watts × 0.00134102209. For example, 5 W = 0.00670511 hp."
    },
    {
      "q": "How do I convert horsepower (mechanical) back to watts?",
      "a": "Multiply by the inverse factor 745.6998716 (watts = horsepower (mechanical) × 745.6998716), or use the horsepower (mechanical)-to-watts 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=W&to_unit=hp",
    "calculator": "https://tttkmbb.com/api/v1/calculate/power?value=5&from_unit=W&to_unit=hp",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "W",
      "to_unit": "hp"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/watts-to-hp",
    "markdown": "https://tttkmbb.com/conversion/watts-to-hp.md",
    "json": "https://tttkmbb.com/conversion/watts-to-hp.json",
    "reverse": "https://tttkmbb.com/conversion/hp-to-watts",
    "quantity_converter": "https://tttkmbb.com/conversion/power",
    "units": "https://tttkmbb.com/api/v1/units?quantity=power"
  },
  "timestamp": "2026-09-24"
}