Roman Stadia to Miles (stadium to mi)

1 Roman stadium equals 0.1149536706 miles (rounded).

1 Roman stadium = 0.1149536706 miles

How to convert Roman stadia to miles

To convert Roman stadia to miles, multiply the number of Roman stadia by 0.1149536706. The factor is rounded to 10 significant digits. To go the other way, multiply miles by 8.699156757 (rounded).

miles = Roman stadia × 0.1149536706

Example: 10 Roman stadia = 1.149536706 miles.

Approximate value. Standards for the Roman stadium varied by place and period, so this converter uses the most commonly cited value. Treat results as estimates, not exact figures.

About these units

Roman Stadium (stadium)

Ancient RomanHistorical unit (no longer in standard use)Approximate value

125 paces or 625 Roman feet, about 185 m. One eighth of a Roman mile.

Borrowed from the Greek stadion, the Latin stadium named a racecourse length that Romans also used as a route unit. It was defined as 125 paces, or 625 Roman feet, and eight of them made one Roman mile. That puts it at about 185 m, the figure used here, and it is the ancestor of the medieval furlong, itself an eighth of a mile.

The Greek original is far less settled. By Herodotus a stadion was 600 Greek feet, but the foot varied across the Greek world, so historians propose anything from roughly 150 m to 210 m. Itinerary, Olympic, Attic and Persian versions have each been argued for, with figures near 157 m, 192 m, 185 m and 196 m respectively. The Roman value lines up with the Attic estimate rather than the others.

Because the Roman unit is defined through a foot of about 296 mm, any change to that foot changes the stadium too. Surveyors and geographers used the unit for road distances and for scaling the world, and today it survives mostly in the word stadium for a sports venue.

1 Roman stadium = 185 meters (approximately).

Sources: Wikipedia: Roman units of measurement; Wikipedia: Stadion (unit); Wikipedia: Roman mile

Mile (mi)

US & ImperialCurrent unit

5,280 feet or 1,760 yards, exactly 1,609.344 meters. This is the statute (international) mile used on US and UK roads.

A thousand paces gave the mile its name. It descends from the Latin mille passus, the Roman mile, by way of Old English mil and Middle English myle. For centuries after Rome, miles of many lengths coexisted; a sixteenth-century Mercator map, for example, shows small, medium and large Flemish miles on a single scale bar. The English statute mile was fixed by an Act of Parliament under Elizabeth I in 1593, which declared that a mile contains eight furlongs, or 5,280 feet.

The 1959 international yard and pound agreement made that mile exactly 1,609.344 meters. A slightly longer US survey mile, about 1,609.347 meters, lingered in American land surveys and was slated for retirement from 1 January 2023. Today the mile is the road unit of the United Kingdom, the United States, Liberia and Myanmar, along with several territories such as the Bahamas, Belize, Guam and the US Virgin Islands. In Canada it survives chiefly in rail transport and horse racing.

1 mile = 1,609.344 meters (exactly).

Sources: Wikipedia: Mile; Wikipedia: Foot (unit); NIST Guide to the SI, Appendix B.8: conversion factors

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