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Weights and Measures

To improve the accuracy of measurements, enhance consumer protection, foster fair competition, and facilitate economic growth and trade through technical activities that promote uniformity in national and international legal metrology laws, regulations, standards, test procedures, and enforcement.

OWM fulfills its mission through the following activities:

  • Standards Development
    • Partnering with the National Conference on Weights and Measures (NCWM)
    • Representing the U.S. in the International Organization of Legal Metrology (OIML)
  • Design and Delivery of Training
    • Metrology
    • Weights and Measures Law
    • Inspection Procedures
  • Technical Guidance
  • Publications and Outreach


Industry Impacts

Fare Standards for Rideshare Services

To calculate fares, app-based ride services such as Lyft and Uber don’t use traditional taxi meters, but instead combine data from GPS and cellular networks to



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