{
  "entity_type": "unit_conversion_page",
  "id": "mm-to-micrometers",
  "name": "Millimeters to Micrometers",
  "title": "Millimeters to Micrometers Converter (mm to μm)",
  "description": "Convert millimeters to micrometers: 1 mm = 1000 μm. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.",
  "quantity": "length",
  "quantity_name": "Length",
  "base_unit": "m",
  "from_unit": {
    "symbol": "mm",
    "display": "mm",
    "name": "millimeters",
    "singular": "millimeter"
  },
  "to_unit": {
    "symbol": "um",
    "display": "μm",
    "name": "micrometers",
    "singular": "micrometer"
  },
  "linear": true,
  "factor": 1000,
  "inverse_factor": 0.001,
  "formula": "micrometers = millimeters × 1000",
  "reverse_formula": "millimeters = micrometers × 0.001",
  "unit_relation": "1 mm = 1000 μm",
  "examples": [
    {
      "value": 5,
      "result": 5000,
      "text": "5 mm = 5000 μm"
    },
    {
      "value": 12.5,
      "result": 12500,
      "text": "12.5 mm = 12500 μm"
    },
    {
      "value": 100,
      "result": 100000,
      "text": "100 mm = 100000 μm"
    }
  ],
  "table": [
    {
      "mm": 1,
      "um": 1000
    },
    {
      "mm": 2,
      "um": 2000
    },
    {
      "mm": 3,
      "um": 3000
    },
    {
      "mm": 4,
      "um": 4000
    },
    {
      "mm": 5,
      "um": 5000
    },
    {
      "mm": 6,
      "um": 6000
    },
    {
      "mm": 7,
      "um": 7000
    },
    {
      "mm": 8,
      "um": 8000
    },
    {
      "mm": 9,
      "um": 9000
    },
    {
      "mm": 10,
      "um": 10000
    },
    {
      "mm": 15,
      "um": 15000
    },
    {
      "mm": 20,
      "um": 20000
    },
    {
      "mm": 25,
      "um": 25000
    },
    {
      "mm": 30,
      "um": 30000
    },
    {
      "mm": 40,
      "um": 40000
    },
    {
      "mm": 50,
      "um": 50000
    },
    {
      "mm": 75,
      "um": 75000
    },
    {
      "mm": 100,
      "um": 100000
    },
    {
      "mm": 200,
      "um": 200000
    },
    {
      "mm": 250,
      "um": 250000
    },
    {
      "mm": 500,
      "um": 500000
    },
    {
      "mm": 1000,
      "um": 1000000
    }
  ],
  "faq": [
    {
      "q": "How many micrometers are in one millimeter?",
      "a": "1 mm = 1000 μm. 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 millimeters to micrometers?",
      "a": "Multiply the value in millimeters by 1000: micrometers = millimeters × 1000. For example, 5 mm = 5000 μm."
    },
    {
      "q": "How do I convert micrometers back to millimeters?",
      "a": "Multiply by the inverse factor 0.001 (millimeters = micrometers × 0.001), or use the micrometers-to-millimeters 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=mm&to_unit=um",
    "calculator": "https://tttkmbb.com/api/v1/calculate/length?value=5&from_unit=mm&to_unit=um",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "mm",
      "to_unit": "um"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/mm-to-micrometers",
    "markdown": "https://tttkmbb.com/conversion/mm-to-micrometers.md",
    "json": "https://tttkmbb.com/conversion/mm-to-micrometers.json",
    "reverse": "https://tttkmbb.com/conversion/micrometers-to-mm",
    "quantity_converter": "https://tttkmbb.com/conversion/length",
    "units": "https://tttkmbb.com/api/v1/units?quantity=length"
  },
  "timestamp": "2026-09-24"
}