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  2. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    The nanometre (SI symbol: nm) is a unit of length in the metric system equal to 10 −9 metres (⁠ 1 / 1 000 000 000 ⁠ m = 0. 000 000 001 m). To help compare different orders of magnitude, this section lists lengths between 10 −9 and 10 −8 m (1 nm and 10 nm). 1 nm – diameter of a carbon nanotube

  3. List of conversion factors - Wikipedia

    en.wikipedia.org/wiki/List_of_conversion_factors

    Conversions between units in the metric system are defined by their prefixes (for example, 1 kilogram = 1000 grams, 1 milligram = 0.001 grams) and are thus not listed in this article. Exceptions are made if the unit is commonly known by another name (for example, 1 micron = 10 −6 metre).

  4. Help:Convert units - Wikipedia

    en.wikipedia.org/wiki/Help:Convert_units

    m 2: square metre: square meter cm2: cm 2: ... Nm: N⋅m: newton-metre: newton-meter ... Conversion of the Mach unit of speed depends on the altitude at which the ...

  5. Template:Convert/list of units/length/short list - Wikipedia

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

    Length (system unit unit-code symbol or abbrev. notes sample default conversion combination output units SI: megametre: Mm Mm US spelling: megameter 1.0 Mm (620 mi) kilometre

  6. Barn (unit) - Wikipedia

    en.wikipedia.org/wiki/Barn_(unit)

    A barn (symbol: b) is a metric unit of area equal to 10 −28 m 2 (100 fm 2).This is equivalent to a square that is 10 −14 m (10 fm) each side, or a circle of diameter approximately 1.128 × 10 −14 m (11.28 fm).

  7. List of unusual units of measurement - Wikipedia

    en.wikipedia.org/wiki/List_of_unusual_units_of...

    An American football field, including both end zones, is 360 by 160 ft (120.0 by 53.3 yd; 109.7 by 48.8 m), or 57,600 square feet (5,350 m 2) (0.535 hectares or 1.32 acres). A Canadian football field is 65 yards (59 m) wide and 110 yards (100 m) long with end zones adding a combined 40 yards (37 m) to the length, making it 87,750 square feet ...

  8. Orders of magnitude (area) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(area)

    List of orders of magnitude for area 10 −70 to 10 −9 square metres; Factor (m 2) Multiple Value Item 10 −70 2.6 × 10 −70 m 2: Planck area, [1] 10 −60: 1 square quectometre: 10 −54: 1 square rontometre: 10 −52 100 rm 2: 1 shed [2] 10 −48: 1 square yoctometre (ym 2) 1 ym 2 10 −43 100,000 ym 2: 1 femtobarn [3] 10 −42

  9. Conversion of units - Wikipedia

    en.wikipedia.org/wiki/Conversion_of_units

    Conversion of units is the conversion of the unit of measurement in which a quantity is expressed, typically through a multiplicative conversion factor that changes the unit without changing the quantity. This is also often loosely taken to include replacement of a quantity with a corresponding quantity that describes the same physical property.