Single conversion

Use GET /v1/convert with query parameters or POST /v1/convert with a JSON body. Both share the same conversion engine.

Rules

• Send value as a decimal string
• Prefer canonical unit IDs from GET /v1/units
• Source and target must be in the same category
• Optional decimals (0-40) rounds result.value; see precision
• Authentication is required

Example

curl "https://api.unifyunits.com/v1/convert?value=10&from=kg&to=lb&decimals=2" \
  -H "Authorization: Bearer $UNIFYUNITS_API_KEY"

See also precision and batch conversion.