The Unit of Measurement API provides a set of Java language programming interfaces for handling units and quantities.
The interfaces provide a layer which separates client code, that would call the API,
from library code, which implements the API.

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The specification contains Interfaces and abstract classes with methods for unit operations:
* Checking of unit compatibility
* Expression of a quantity in various units
* Arithmetic operations on units

The JSR is lead by Jean-Marie Dautelle (@dautelle), Werner Keil (@keilw) and Otavio Santana (@otaviojava).
You can access the API by adding the following Maven dependencies:

For JSR 385 use <version>2.0-SNAPSHOT</version> or <version>2.0-EDR</version> .

Further versions can be found here.

Release artifacts should be accessible from the following repositories:

  • Maven Central
  • JCenter by Bintray

Though it is possible to only reference the API from your applicaiton, you also have to add an implementation like the Indriya reference implementation.