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One acre equals 1 ⁄ 640 (0.0015625) square mile, 4,840 square yards, 43,560 square feet, [2] or about 4,047 square metres (0.4047 hectares) (see below).While all modern variants of the acre contain 4,840 square yards, there are alternative definitions of a yard, so the exact size of an acre depends upon the particular yard on which it is based.
Area; system unit code (alternative) QID symbol or abbrev. notes sample default conversion combinations SI: square kilometre: km2 Q712226: km 2: US spelling: square kilometer: 1.0 km 2 (0.39 sq mi) km2 sqmi; square hectometre: hm2 Q35852: hm 2: US spelling: square hectometer: 1.0 hm 2 (2.5 acres) square decametre: dam2 Q23931040: dam 2: US ...
The Irish acre or plantation acre measured one Irish chain by one Irish furlong, or 4 Irish perches by 40, or 7840 square yards: approximately 0.66 hectares or 1.62 statute acres. [54] The Lancashire acre around the Solway Firth and the Churchland acre in Yorkshire were the same size, which Frederic Seebohm in 1914 connected to the erw of Gwent ...
nautical mile (Admiralty) NM (Adm); nmi (Adm) = 6080 ft = 1 853.184 m: nautical mile (international) NM; nmi ≡ 1852 m [9] ≡ 1852 m: nautical mile (US pre 1954) ≡ 1853.248 m ≡ 1853.248 m pace: ≡ 2.5 ft [4] = 0.762 m palm: ≡ 3 in [4] = 0.0762 m parsec: pc Distant point with a parallax shift of one arc second from a base of one ...
The square kilometre (square kilometer in American spelling; symbol: km 2) is a multiple of the square metre, the SI unit of area or surface area. In the SI unit of area (m 2), 1 km 2 is equal to 1M(m 2). 1 km 2 is equal to: 1,000,000 square metres (m 2) 100 hectares (ha) It is also approximately equal to: 0.3861 square miles [2] 247.1 acres [3 ...
Square miles should not be confused with miles square, a square region with each side having a length of the value given. For example, a region which is 20 miles square (20 miles × 20 miles) has an area of 400 sq mi; a rectangle of measuring 10 miles × 40 miles also has an area of 400 sq mi, but is not 20 miles square.
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total volume of the body of water (cubic metres, cubic kilometres, cubic miles [cu mi], and/or acre-feet) Sample value: 11.8 km³ To convert acre-feet, use {{convert|1234567|acre.ft|abbr=on}} this renders as 1,234,567 acre⋅ft (1.522816 × 10 9 m 3) residence_time residence time of the body of water or lake retention time (generally in years ...