The units of measurement of ancient Rome were generally consistent and well documented.
Bronze modius measure (4th century AD) with inscription acknowledging Imperial regulation of weights and measures
Roman milestone in modern Austria (AD 201), indicating a distance of 28 Roman miles (~41 km) to Teurnia
A Roman steelyard weight of one dodrans, i.e. 3⁄4 libra
League (unit)
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A league is a unit of length. It was common in Europe and Latin America, but due to its highly inconsistent definition, it is no longer an official unit in any nation. Derived from an ancient Celtic u
Ancient Roman units of measurement
…or 125 passus or 1⁄8 mille mille passus mille passuum (Roman) mile 5,000 pedes 1.48 km 4,854 ft 0.919 mi 1000 passus or 8 stadia leuga leuca (Gallic) league 7,500 pedes 2.22 km 7,281 ft 1.379 mi Except where noted, based on Smith (1851). English and metric equivalents are approximate, converted at 1 pes…
Milestone in the Province of Ávila, Spain indicating a distance of 9 leagues to the city of Ávila