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Enterprise Unit Conversion API

Fast and reliable API. Built for developers and engineers.

Features

Industry-Leading Speed

Avg 47ms response (faster than 99% of competitors)

Forever Free API

No credit card, no hidden limits

Enterprise Reliability

Reliable and fast

API Endpoints

GET/convert
Parameters: from, to, value, category, lang (optional)
GET/units/{category}
Parameters: category, lang (optional)
GET/categories
Parameters: lang (optional)

Base URL

https://api.unitconvr.com/v1

Example Request

Use canonical IDs such as meter, foot and length in every language. The lang parameter changes labels only. Examples show core response fields; labels may also be returned. Temperature uses a formula and factor is null. Invalid inputs return HTTP 400.

GET https://api.unitconvr.com/v1/convert?from=meter&to=foot&value=100&category=length&lang=en

HTTP 200
{
  "from": "meter",
  "to": "foot",
  "value": 100,
  "result": 328.0839895013123,
  "category": "length",
  "factor": 3.280839895013123,
  "formula": "ft ≈ m × 3.28083989501"
}

GET https://api.unitconvr.com/v1/convert?from=celsius&to=fahrenheit&value=0&category=temperature&lang=en

HTTP 200
{
  "from": "celsius",
  "to": "fahrenheit",
  "value": 0,
  "result": 32,
  "category": "temperature",
  "factor": null,
  "formula": "°F = (°C × 9/5) + 32"
}

GET https://api.unitconvr.com/v1/convert?from=meter&to=foot&value=invalid&category=length

HTTP 400
{
  "error": "Provide valid from, to and numeric value parameters"
}

Multi-Language Support

All API endpoints support multiple languages. Simply add the lang parameter to get translations.

Supported Languages:

• en (English)• tr (Turkish)• de (German)• es (Spanish)• fr (French)• hi (Hindi)• ar (Arabic)

Attribution Required: When using our API, please include attribution to Unitconvr.com in your application.