{
  "entity_type": "unit_conversion_page",
  "id": "hectares-to-square-km",
  "name": "Hectares to Square kilometers",
  "title": "Hectares to Square kilometers Converter (ha to km²)",
  "description": "Convert hectares to square kilometers: 1 ha = 0.01 km². Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.",
  "quantity": "area",
  "quantity_name": "Area",
  "base_unit": "m2",
  "from_unit": {
    "symbol": "ha",
    "display": "ha",
    "name": "hectares",
    "singular": "hectare"
  },
  "to_unit": {
    "symbol": "km2",
    "display": "km²",
    "name": "square kilometers",
    "singular": "square kilometer"
  },
  "linear": true,
  "factor": 0.01,
  "inverse_factor": 100,
  "formula": "square kilometers = hectares × 0.01",
  "reverse_formula": "hectares = square kilometers × 100",
  "unit_relation": "1 ha = 0.01 km²",
  "examples": [
    {
      "value": 5,
      "result": 0.05,
      "text": "5 ha = 0.05 km²"
    },
    {
      "value": 12.5,
      "result": 0.125,
      "text": "12.5 ha = 0.125 km²"
    },
    {
      "value": 100,
      "result": 1,
      "text": "100 ha = 1 km²"
    }
  ],
  "table": [
    {
      "ha": 1,
      "km2": 0.01
    },
    {
      "ha": 2,
      "km2": 0.02
    },
    {
      "ha": 3,
      "km2": 0.03
    },
    {
      "ha": 4,
      "km2": 0.04
    },
    {
      "ha": 5,
      "km2": 0.05
    },
    {
      "ha": 6,
      "km2": 0.06
    },
    {
      "ha": 7,
      "km2": 0.07
    },
    {
      "ha": 8,
      "km2": 0.08
    },
    {
      "ha": 9,
      "km2": 0.09
    },
    {
      "ha": 10,
      "km2": 0.1
    },
    {
      "ha": 15,
      "km2": 0.15
    },
    {
      "ha": 20,
      "km2": 0.2
    },
    {
      "ha": 25,
      "km2": 0.25
    },
    {
      "ha": 30,
      "km2": 0.3
    },
    {
      "ha": 40,
      "km2": 0.4
    },
    {
      "ha": 50,
      "km2": 0.5
    },
    {
      "ha": 75,
      "km2": 0.75
    },
    {
      "ha": 100,
      "km2": 1
    },
    {
      "ha": 200,
      "km2": 2
    },
    {
      "ha": 250,
      "km2": 2.5
    },
    {
      "ha": 500,
      "km2": 5
    },
    {
      "ha": 1000,
      "km2": 10
    }
  ],
  "faq": [
    {
      "q": "How many square kilometers are in one hectare?",
      "a": "1 ha = 0.01 km². 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 hectares to square kilometers?",
      "a": "Multiply the value in hectares by 0.01: square kilometers = hectares × 0.01. For example, 5 ha = 0.05 km²."
    },
    {
      "q": "How do I convert square kilometers back to hectares?",
      "a": "Multiply by the inverse factor 100 (hectares = square kilometers × 100), or use the square kilometers-to-hectares 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=ha&to_unit=km2",
    "calculator": "https://tttkmbb.com/api/v1/calculate/area?value=5&from_unit=ha&to_unit=km2",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "ha",
      "to_unit": "km2"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/hectares-to-square-km",
    "markdown": "https://tttkmbb.com/conversion/hectares-to-square-km.md",
    "json": "https://tttkmbb.com/conversion/hectares-to-square-km.json",
    "reverse": "https://tttkmbb.com/conversion/square-km-to-hectares",
    "quantity_converter": "https://tttkmbb.com/conversion/area",
    "units": "https://tttkmbb.com/api/v1/units?quantity=area"
  },
  "timestamp": "2026-09-24"
}