Puerto Rican units of measurement

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Several units of measurements were used in Puerto Rico. The metric system has been compulsory since 1860 in Puerto Rico.[1] However, there are exceptions, such as speed limits posted in miles per hour along roadways.

System before metric system[edit]

Several units were used before metric adoption. These units were older Spanish units.

Area: Cuerda[edit]

Several units were used to measure area. One cuerda was equal to 2250 vara2(1572 m2).[1] It continues to be an official unit of land measure in Puerto Rico today.[2]


  1. ^ a b Washburn, E.W. (1926). International Critical Tables of Numerical Data, Physics, Chemistry and Technology. 1. New York: McGraw-Hil Book Company, Inc. p. 10. Retrieved 8 February 2015.
  2. ^ Units - Cuerda. Sizes.com. Puerto Rico Act 135, section 4 (page 100), 1913–14, as amended by Act No. 3, 1913–14: A cuerda, quote: "a unit of land area, approximately 3,930 square meters (approximately 0.971 acres)...In land measurements and records, the measurement by cuerda customarily used in Porto [sic] Rico...equivalent to 3,930.395625 square meters..."