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  2. Template:Convert/list of units/area - Wikipedia

    en.wikipedia.org/wiki/Template:Convert/list_of...

    equivalent to one square hectometre 1.0 ha (2.5 acres) Imperial & US customary: square mile: sqmi Q232291: sq mi 1.0 sq mi (2.6 km 2) sqmi km2; acre: acre Q81292 (none) 1.0 acre (0.40 ha) square yard: sqyd Q1550511: sq yd 1.0 sq yd (0.84 m 2) square foot: sqft (ft2, sqfoot, foot2) Q857027: sq ft long code "sqfoot (foot2)" outputs square foot ...

  3. Pyeong - Wikipedia

    en.wikipedia.org/wiki/Pyeong

    In Korea, the period of Japanese occupation produced a pyeong of ⁠ 400 / 121 ⁠ or 3.3058 m 2.It is the standard traditional measure for real estate floorspace, with an average house reckoned as about 25 pyeong, a studio apartment as 8–12 py, and a garret as 1½ py.

  4. Rai, ngan, and tarang wa - Wikipedia

    en.wikipedia.org/wiki/Rai,_ngan,_and_tarang_wa

    The rai, [a] ngan, [b] and tarang wa or square wa [c] are customary Thai units of area, used in the measurement of land. They are defined as exactly 1,600, 400, and 4 square metres, respectively (17,222, 4,306, and 43 sq ft). [1] The tarang wa (square wa, tarang meaning 'grid') is derived from the area of a square with sides of 1 wa (the Thai ...

  5. Historical Russian units of measurement - Wikipedia

    en.wikipedia.org/wiki/Historical_Russian_units...

    Proprietor's (владе́льческая десяти́на, vladel'cheskaya desyatina) = 14,567.2 m 2 = 156,800 sq ft = 3,200 square sazhen' ... 400 163.807 kg

  6. List of conversion factors - Wikipedia

    en.wikipedia.org/wiki/List_of_conversion_factors

    square foot equivalent direct radiation: sq ft EDR ≡ 240 BTU IT /h ≈ 70.337 057 W: ton of air conditioning: ≡ 2000 lb of ice melted / 24 h ≈ 3504 W: ton of refrigeration (imperial) ≡ 2240 lb × ice IT / 24 h: ice IT = 144 °F × 2326 J/kg⋅°F ≈ 3.938 875 × 10 3 W: ton of refrigeration (IT) ≡ 2000 lb × ice IT / 24 h: ice IT ...

  7. Foot-candle - Wikipedia

    en.wikipedia.org/wiki/Foot-candle

    The foot-candle is defined as one lumen per square foot. This unit is commonly used in lighting layouts in parts of the world where United States customary units are used, mainly the United States. [1] Nearly all of the world uses the corresponding SI derived unit lux, defined as one lumen per square meter.

  8. Taiwanese units of measurement - Wikipedia

    en.wikipedia.org/wiki/Taiwanese_units_of_measurement

    400 / 121 ⁠ m 2: 3.306 m 2 ⁠ 625,000,000 / 158,080,329 ⁠ sq yd: 35.58 sq ft Same as Japanese Tsubo: Bó͘ ...

  9. Square mile - Wikipedia

    en.wikipedia.org/wiki/Square_mile

    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.