{
  "entity_type": "unit_conversion_page",
  "id": "mach-to-kmh",
  "name": "Mach (sea level) to Kilometers per hour",
  "title": "Mach (sea level) to Kilometers per hour Converter (mach to km/h)",
  "description": "Convert Mach (sea level) to kilometers per hour: 1 mach = 1225.06 km/h. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.",
  "quantity": "speed",
  "quantity_name": "Speed",
  "base_unit": "m/s",
  "from_unit": {
    "symbol": "mach",
    "display": "mach",
    "name": "Mach (sea level)",
    "singular": "Mach"
  },
  "to_unit": {
    "symbol": "km/h",
    "display": "km/h",
    "name": "kilometers per hour",
    "singular": "kilometer per hour"
  },
  "linear": true,
  "factor": 1225.0584,
  "inverse_factor": 0.0008162876153,
  "formula": "kilometers per hour = Mach (sea level) × 1225.0584",
  "reverse_formula": "Mach (sea level) = kilometers per hour × 0.0008162876153",
  "unit_relation": "1 mach = 1225.06 km/h",
  "examples": [
    {
      "value": 5,
      "result": 6125.29,
      "text": "5 mach = 6125.29 km/h"
    },
    {
      "value": 12.5,
      "result": 15313.2,
      "text": "12.5 mach = 15313.2 km/h"
    },
    {
      "value": 100,
      "result": 122506,
      "text": "100 mach = 122506 km/h"
    }
  ],
  "table": [
    {
      "mach": 1,
      "km/h": 1225.06
    },
    {
      "mach": 2,
      "km/h": 2450.12
    },
    {
      "mach": 3,
      "km/h": 3675.18
    },
    {
      "mach": 4,
      "km/h": 4900.23
    },
    {
      "mach": 5,
      "km/h": 6125.29
    },
    {
      "mach": 6,
      "km/h": 7350.35
    },
    {
      "mach": 7,
      "km/h": 8575.41
    },
    {
      "mach": 8,
      "km/h": 9800.47
    },
    {
      "mach": 9,
      "km/h": 11025.5
    },
    {
      "mach": 10,
      "km/h": 12250.6
    },
    {
      "mach": 15,
      "km/h": 18375.9
    },
    {
      "mach": 20,
      "km/h": 24501.2
    },
    {
      "mach": 25,
      "km/h": 30626.5
    },
    {
      "mach": 30,
      "km/h": 36751.8
    },
    {
      "mach": 40,
      "km/h": 49002.3
    },
    {
      "mach": 50,
      "km/h": 61252.9
    },
    {
      "mach": 75,
      "km/h": 91879.4
    },
    {
      "mach": 100,
      "km/h": 122506
    },
    {
      "mach": 200,
      "km/h": 245012
    },
    {
      "mach": 250,
      "km/h": 306265
    },
    {
      "mach": 500,
      "km/h": 612529
    },
    {
      "mach": 1000,
      "km/h": 1225060
    }
  ],
  "faq": [
    {
      "q": "How many kilometers per hour are in one Mach?",
      "a": "1 mach = 1225.06 km/h. 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 Mach (sea level) to kilometers per hour?",
      "a": "Multiply the value in Mach (sea level) by 1225.0584: kilometers per hour = Mach (sea level) × 1225.0584. For example, 5 mach = 6125.29 km/h."
    },
    {
      "q": "How do I convert kilometers per hour back to Mach (sea level)?",
      "a": "Multiply by the inverse factor 0.0008162876153 (Mach (sea level) = kilometers per hour × 0.0008162876153), or use the kilometers per hour-to-Mach (sea level) 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=mach&to_unit=km%2Fh",
    "calculator": "https://tttkmbb.com/api/v1/calculate/speed?value=5&from_unit=mach&to_unit=km%2Fh",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "mach",
      "to_unit": "km/h"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/mach-to-kmh",
    "markdown": "https://tttkmbb.com/conversion/mach-to-kmh.md",
    "json": "https://tttkmbb.com/conversion/mach-to-kmh.json",
    "reverse": "https://tttkmbb.com/conversion/kmh-to-mach",
    "quantity_converter": "https://tttkmbb.com/conversion/speed",
    "units": "https://tttkmbb.com/api/v1/units?quantity=speed"
  },
  "timestamp": "2026-09-24"
}