Puerto Rican units of measurement
Several units of measurements are used in Puerto Rico. The units of measurements officially in use in Puerto Rico are the SI units (metric system) and the United States customary units, with the metric system officially adopted earlier during Spanish rule in 1860. The only Spanish unit of measurement still in official use, is the unit of area measurement cuerda.
For this reason, the use of different units, either separately or in the same context with supplements, is the norm in Puerto Rico.
For example, weather reports are generally given in Fahrenheit, inches, feet, miles per hour and knots, because Puerto Rico uses weather forecasts from the National Oceanic and Atmospheric Administration of the United States, with metric supplements generally restricted to websites which use them; altitudes and depths for geographical features are given in both meters and feet as well as kilometers and miles; roadway distance signs are measured in kilometers and since 1980, gasoline is sold by the liter, however speed limits are measured in miles per hour; house and retail sizes are generally given in square feet, but rarely in square meters; land sizes are generally given in cuerdas and acres, but rarely in hectares; height and weight are given inches, feet and pounds, but also in centimeters, meters and kilograms ; fruits and vegetables are generally measured and sold in pounds and ounces; and packaged products always include both metric units and U.S. customary units.