Square Miles to Se (mi² to se)
1 square mile equals 26,115.71345 se (rounded).
How to convert square miles to se
To convert square miles to se, multiply the number of square miles by 26,115.71345. The factor is rounded to 10 significant digits. To go the other way, multiply se by 0.00003829112316 (rounded).
se = square miles × 26,115.71345
Example: 10 square miles = 261,157.1345 se.
About these units
Square Mile (mi²)
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
Se (se)
30 tsubo, about 99.17 m².
Between the humble tsubo and the field-sized tan sits the se, a plot of 30 tsubo. In square metres that is exactly 12,000/121, or about 99.17, which is just under one are, the metric land unit of 100 square metres. A se measures roughly ten metres by ten, a small garden or a slice of a paddy.
The scale is decimal above this point. Ten se make one tan, and a hundred se make one cho, so the se works as the first step in the farmland ladder rather than a unit with a life of its own. Property listings today seldom use it, and it is mostly met in old land records and in conversion tables.
Its exact size comes from the Meiji legal definition. The 1891 law set the shaku at 10/33 metre, and the tsubo as the square of six shaku, so every larger land unit built on the tsubo inherited a fixed metric value. Before that, the shaku itself varied by era and use.
1 se = 99.17355372 square meters (approximately).
Sources: Wikipedia: Japanese units of measurement; Wikipedia: Shaku (unit); Wikipedia: Tsubo
Related conversions
- Se to square miles (reverse)
- Square miles to square meters
- Square miles to square kilometers
- Square miles to hectares
- Square miles to square inches
- Square miles to square feet
- Square miles to square yards
- Square miles to acres
- Square miles to square centimeters
- Square miles to square millimeters
- Square miles to tsubo
- Square miles to pyeong
- Square miles to rai (Thai)
- Square meters to se
- Square kilometers to se
- Hectares to se
- Square inches to se
- Square feet to se
- Square yards to se
- Acres to se
See all area units.