Units of measurement are a fundamental element of scientific discourse and data integration. The LTER Unit Working Group has developed two initiatives to promote consistent use of units throughout the network. One is the LTER Unit Dictionary, comprising the set of units in use by the LTER sites and the best practices that support them. The other is the Unit Registry, a software solution for online access to the Unit Dictionary. This poster provides an overview of both efforts, including motivations, progress made, and future plans.