The Roman system of measurement was based on the foot and the digit, which were both subdivided into 12 parts. The basic unit of length was the pes (foot), which was divided into 12 unciae (inches). The basic unit of area was the jugerum (square yard), which was divided into 100 centuria (square feet). Other units of length included the passus (2 feet), the actus (120 feet), and the mile (1,000 paces). Units of capacity included the sextarius or hemina (1/6 gallon) and amphora or congius (3 gallons). Units of weight included the libra or uncia (1/12 pound) and talentum or modius (56 pounds).