1 cuartillo is variable among countries, but defined as 4 octavillos or 1/4 almude and contains 1.156 l ≈ 1.222 qt(US) (liquid) ≈ 1.017 qt(Imp)
1 fanega = 12 almudes = 48 cuartillos ≈ 55.50 l ≈ 1.960 ft3 (1.575 U.S. bushels)
^In calculations, the equivalence of 7000 m2 or .7 hectare per manzana is often used to simplify conversion.
^Legua denoting area is equal to 1 square legua denoting length. In Latin America and southwestern United States, this is 4428.4 acres, 6.919 square miles, 1792 hectares, or 17.92 square kilometers.
^The Spanish libra is slightly larger than the English pound, generally in the range from 1.011 to 1.016 English pound. Both are derived from the Roman libra, hence the abbreviation lbs for English pounds.
^In Honduras and El Salvador a sack of beans or coffee typically weighs one quintal. Two of these are loaded on a mule or horse to make one load, or carga in Spanish. The unit carga is cited for yuca and yams as approximately 90.72 kg. There are other Spanish and Portuguese speaking countries in which a carga is equal to 3 quintals or equal to a volume of 3 quintals of a commodity being shipped.
^ abcdefghWashburn, E.W. (1926). International Critical Tables of Numerical Data, Physics, Chemistry and Technology. New York: McGraw-Hil Book Company, Inc. p. 5.
^ abcdefCardarelli, F. (2003). Encyclopaedia of Scientific Units, Weights and Measures. Their SI Equivalences and Origins. London: Springer. pp. 157, 158. ISBN978-1-4471-1122-1.
^Technical Conversion Factors for Agricultural Commodities. Rome: Food and Agriculture Organization of the United Nations. 1972. p. 155.
^World Weights and Measures. Handbook for Statisticians (Statistical Papers. Series M no. 21 Revision 1. (ST/STAT/SER.M/21/rev.1) ed.). New York: United Nations: United Nations. Department of Economic and Social Affairs. Statistical Office of the United Nations. 1966.