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ready The Unified Code for Units of Measure

Abbreviation: UCUM

General Information
The Unified Code for Units of Measure is a code system intended to include all units of measures being contemporarily used in international science, engineering, and business. The purpose is to facilitate unambiguous electronic communication of quantities together with their units. The focus is on electronic communication, as opposed to communication between humans. A typical application of The Unified Code for Units of Measure are electronic data interchange (EDI) protocols, but there is nothing that prevents it from being used in other types of machine communication.


Countries that developed this resource United States

Created in 1999

Taxonomic range

How to cite this record UCUM; The Unified Code for Units of Measure; DOI:; Last edited: Jan. 9, 2021, 12:18 p.m.; Last accessed: Sep 25 2021 3:33 a.m.

Record added: Nov. 17, 2015, 6:06 p.m.
Record updated: Jan. 9, 2021, 12:16 p.m. by The FAIRsharing Team.

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Additional Information



No XSD schemas defined

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Applies to: Data use

Data Release

Data Access

REST Web Services


Units of measure in clinical information systems.

Schadow G,McDonald CJ,Suico JG,Fohring U,Tolxdorff T
J Am Med Inform Assoc 1999

View Paper (PubMed) View Publication

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