Square Miles to Feddans (mi² to fd)

1 square mile equals 616.6638358 feddans (rounded).

1 square mile = 616.6638358 feddans

How to convert square miles to feddans

To convert square miles to feddans, multiply the number of square miles by 616.6638358. The factor is rounded to 10 significant digits. To go the other way, multiply feddans by 0.001621629066 (rounded).

feddans = square miles × 616.6638358

Example: 10 square miles = 6,166.638358 feddans.

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

About these units

Square Mile (mi²)

US & ImperialCurrent unit

640 acres or about 2.59 km². Used for the area of cities, states and countries in the US and UK.

A thousand Roman paces, mille passus, became the mile, and under Elizabeth I Parliament fixed the statute mile at eight furlongs, or 5,280 feet, in place of the older Roman-based value. The square mile inherits that length. Its most famous use came in the United States: the Land Ordinance of 1785 started the Public Land Survey System so that western land could be surveyed and sold to pay war debts, beginning with the Seven Ranges in eastern Ohio.

In that system a section is roughly one square mile, or 640 acres, and a township is 36 sections in a square six miles on a side. One square mile is nearly 2.59 million square meters. Chicago's Midway International Airport, at about 650 acres, covers roughly 1.02 square miles. Beware the phrase mile square: a region 20 miles square has 400 square miles, but so does a rectangle 10 by 40 miles. The US survey version of the mile was retired from 1 January 2023, but the international square mile remains the unit for cities, states and countries in the US and UK.

1 square mile = 2,589,988.11 square meters (approximately).

Sources: Wikipedia: Square mile; Wikipedia: Public Land Survey System; Wikipedia: Mile

Feddan (fd)

Middle EasternTraditional unit (still used in some regions)Approximate value

About 4,200 m² (1.037 acres). The standard unit of farmland in Egypt, divided into 24 qirat.

In Classical Arabic faddan meant a yoke of oxen, so the name points to the ground a team could plough in a season. That idea explains why the feddan was never a single fixed size everywhere: in Syria it stayed vague, covering roughly 5 to 12 hectares of land worked by a pair of oxen over a year.

Egypt gave it a precise value. The metric system became optional there in 1873 and compulsory for government use in 1891, and the 1891 equivalences set the feddan near 4,200.8 square metres. The main Wikipedia article rounds this to 4,200 square metres, based on a plot of 60 by 70 metres, and the figure used here follows that article. The two readings differ by well under a tenth of a percent, or about 1.04 acres.

The feddan is divided into 24 qirat, each about 175 square metres, with a finer sahm equal to one 576th of a feddan. It was the one non-metric unit that stayed in everyday use in Egypt after metrication, and it is still the normal measure for farmland there, with use in Sudan, South Sudan and Oman as well.

1 feddan = 4,200 square meters (approximately).

Sources: Wikipedia: Feddan; Wikipedia: Egyptian units of measurement

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