UDUNITS

The UDUNITS package supports units of physical quantities. Its C library provides for arithmetic manipulation of units and for conversion of numeric values between compatible units. The package contains an extensive unit database, which is in XML format and user-extendable. The package also contains a command-line utility for investigating units and converting values.

To Access Resource:

Questions? Email Resource Support Contact:

  • Steven Emmerson
    support-udunits@unidata.ucar.edu
    UCAR/UCP - Unidata

Resource Type software
Temporal Range Begin N/A
Temporal Range End N/A
Temporal Resolution N/A
Bounding Box North Lat N/A
Bounding Box South Lat N/A
Bounding Box West Long N/A
Bounding Box East Long N/A
Spatial Representation N/A
Spatial Resolution N/A
Related Links

Documentation : Online user and API documentation

GitHub : GitHub repository of UDUNITS-2 source code
Additional Information N/A
Resource Format ZIP
Standardized Resource Format Archive
Asset Size N/A
Legal Constraints

UDUNITS License (BSD 3-clause derivative)

                                                                              https://github.com/Unidata/UDUNITS-2/blob/master/COPYRIGHT

Access Constraints None
Software Implementation Language C

Resource Support Name Steven Emmerson
Resource Support Email support-udunits@unidata.ucar.edu
Resource Support Organization UCAR/UCP - Unidata
Distributor UCAR/UCP - Unidata
Metadata Contact Name Ryan May
Metadata Contact Email rmay@ucar.edu
Metadata Contact Organization UCAR/UCP - Unidata

Author Steven Emmerson
Publisher UCAR/UCP - Unidata
Publication Date 2007-01-01
Digital Object Identifier (DOI) https://doi.org/10.5065/D6KD1WN0
Alternate Identifier Unidata UDUNITS
Resource Version 2.2.26
Topic Category climatologyMeteorologyAtmosphere
Progress onGoing
Metadata Date 2018-03-27T23:23:27
Metadata Record Identifier e88c3adc-e46a-4c77-81ef-0bc7cecdf173
Metadata Language eng
Suggested Citation Steven Emmerson. (2007). UDUNITS. 2.2.26. UCAR/UCP - Unidata. https://doi.org/10.5065/D6KD1WN0. Accessed 25 October 2025.

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