U.S. Metric Association
The U.S. Metric Association (USMA), based in Rancho Palos Verdes, California, is a non-profit organization that advocates for total conversion to the SI (metric) system in the United States (metrication).
Founded in 1916, it was originally called the American Metric Association.
USMA publishes a monthly newsletter for its members on the state of the metric system in the United States: Metric Today.