Length Converter: API and MCP

Length Converter over REST and MCP: input fields, limits, outputs, one example request and its real answer. Free, no sign-up.

Id: units.length
Version: 1.0.0
Access: Free
Tool page: Length Converter
Schema: GET /api/v1/tools/units.length

Input

Field	Type	Constraints	Description
`value` (required)	number	≥ 0, ≤ 1,000,000,000,000	Length
`from` (required)	string	mm \| cm \| m \| km \| in \| ft \| yd \| mi \| nmi	From
`to` (required)	string	mm \| cm \| m \| km \| in \| ft \| yd \| mi \| nmi	To

Output

Field	Type	Description
`result`	number	Result
`mm`	number	Millimeter (mm)
`cm`	number	Centimeter (cm)
`m`	number	Meter (m)
`km`	number	Kilometer (km)
`in`	number	Inch (in)
`ft`	number	Foot (ft)
`yd`	number	Yard (yd)
`mi`	number	Mile (mi)
`nmi`	number	Nautical mile (nmi)

Example request

{
  "input": {
    "value": 1,
    "from": "mi",
    "to": "km"
  },
  "locale": "en"
}

Example answer

{
  "output": {
    "result": 1.609344,
    "mm": 1609344,
    "cm": 160934.4,
    "m": 1609.344,
    "km": 1.609344,
    "in": 63360,
    "ft": 5280,
    "yd": 1760,
    "mi": 1,
    "nmi": 0.868976241901
  },
  "steps": [
    {
      "id": "factor",
      "formula": "factor = from unit (m) / to unit (m)",
      "substitution": "factor = 1,609.344 / 1,000",
      "value": 1.609344
    },
    {
      "id": "result",
      "formula": "result = value × factor",
      "substitution": "result = 1 × 1.609344",
      "value": 1.609344,
      "unit": "km"
    }
  ],
  "meta": {
    "toolVersion": "1.0.0",
    "locale": "en"
  },
  "citation": {
    "url": "https://hesaplayici.com/en/unit-converter/length-conversion-calculator",
    "title": "Length Converter"
  }
}