OverviewREST · JSON

Unit Converter

Convert length, mass, temperature, volume, area, speed, data, time, pressure and energy.

Method: POST
Endpoint: /v1/unit-convert
Auth: X-API-Key
Format: JSON
Categories: length · mass · temp · volume · area · speed · data · time · pressure · energy
Detection: auto from units
Status: 200 · 400 · 401 · 402 · 429

The category (length, mass, temperature, …) is auto-detected from the unit names — you send a value and two units, nothing else.

Trylive · no key

POST /demo/unit-convert

application/json200

// enter a value and two units, then hit Convert

Pricingmonthly + usage

Referencecurl · SDK · OpenAPI

curl -X POST https://atomios.me/api/v1/unit-convert/ \
  -H "X-API-Key: $ATOMIOS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"value":100,"from":"km","to":"mi"}'

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