---
id: "ucum_code"
kind: "pattern"
status: "draft"
is_pii: false
categories: ["values"]
langs: ["common"]
quality: 60
url: "https://registry.apicrafter.io/datatype/ucum_code"
---

# UCUM unit code (`ucum_code`)

> **Draft.** Draft records have not been reviewed yet and may be incomplete or wrong; do not treat them as authoritative for legal or compliance decisions.

Case-sensitive code of a unit in the Unified Code for Units of Measure (UCUM), built from unit atoms, prefixes and operators, for example kg, m/s, Cel or mm[Hg]. HL7 FHIR and LOINC use it for clinical and laboratory results.

- Pattern of: `unit_of_measure`
- Personal data (PII): no
- Categories: All measurable values (percentage, amount and e.t.c) (values)
- Countries: global
- Languages: Common to most languages (common)
- Classification: categorical

## Examples

- `kg` — kilogram
- `m/s` — metre per second
- `Cel` — degree Celsius
- `mm[Hg]` — millimetre of mercury

## Mappings

- wikidata: `P7825`

## Sources

- doc: <https://ucum.org/ucum>
- wikipedia: <https://en.wikipedia.org/wiki/Unified_Code_for_Units_of_Measure>
- wikidata: <https://www.wikidata.org/wiki/Property:P7825>

## Quality

Score 60/100. Missing: regexp, negative example, translation, detector coverage.

JSON: <https://registry.apicrafter.io/api/v1/datatypes/ucum_code.json> · Edit: <https://github.com/apicrafter/metacrafter-registry/edit/main/data/datatypes/any/values/ucum_code.yaml>