Metric Conversion Act

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Metric Conversion Act
Great Seal of the United States
Long title An Act to declare a national policy of coordinating the increasing use of the metric system in the United States, and to establish a United States Metric Board to coordinate the voluntary conversion to the metric system
Acronyms (colloquial) MCA
Nicknames Metric Conversion Act of 1975
Enacted by the 94th United States Congress
Public Law 94-168
Legislative history
  • Introduced in the House as H.R. 8674 by Olin E. Teague (D-TX) on July 16, 1975
  • Committee consideration by House Science and Technology Committee
  • Passed the House on September 5, 1975 (300–63)
  • Passed the Senate on December 8, 1975  with amendment
  • House agreed to Senate amendment on December 11, 1975 ()
  • Signed into law by President Gerald Ford on December 23, 1975

The Metric Conversion Act is an Act of Congress that U.S. President Gerald Ford signed into law on December 23, 1975. It declared the Metric system "the preferred system of weights and measures for United States trade and commerce", but permitted the use of United States customary units in non-business activities. The Act also established the United States Metric Board with representatives from scientific, technical, and educational institutions, as well as state and local governments to plan, coordinate, and educate the American people for the Metrication of the United States.

Executive Order 12770, which cites the Metric Conversion Act of 1975, directed departments and agencies within the executive branch of the United States Government to "take all appropriate measures within their authority" to use the metric system "as the preferred system of weights and measures for United States trade and commerce."

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