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  2. Minute and second of arc - Wikipedia

    en.wikipedia.org/wiki/Minute_and_second_of_arc

    It is especially popular as a unit of measurement with shooters familiar with the imperial measurement system because 1 MOA subtends a circle with a diameter of 1.047 inches (which is often rounded to just 1 inch) at 100 yards (2.66 cm at 91 m or 2.908 cm at 100 m), a traditional distance on American target ranges.

  3. Milliradian - Wikipedia

    en.wikipedia.org/wiki/Milliradian

    If using the metric unit meters for distance and the imperial unit inches for target size, one has to multiply by a factor of 25.4, since one inch is defined as 25.4 millimeters. distance in meters = target in inches angle in mrad × 25.4 {\displaystyle {\text{distance in meters}}={\frac {\text{target in inches}}{\text{angle in mrad}}}\times 25.4}

  4. Inch - Wikipedia

    en.wikipedia.org/wiki/Inch

    2.54 centimeters (1 inch is exactly 2.54 cm) 25.4 millimetres (1 inch is exactly 25.4 mm) ⁠ 1 / 12 ⁠ or 0.08333 feet ⁠ 1 / 36 ⁠ or 0.2777 yards; 10000 'tenths' [a] 1000 thou [b] or mil [c] 100 points [d] or gries [e] 72 PostScript points [f] 10, [g] [e] 12, [h] or 40 [i] lines; 6 computer picas [j] 3 barleycorns [k] 0.999998 US Survey ...

  5. Decimal degrees - Wikipedia

    en.wikipedia.org/wiki/Decimal_degrees

    0.787 mm: 0.435 mm A value in decimal degrees to a precision of 4 decimal places is precise to 11.1 metres (36 ft) at the equator. A value in decimal degrees to 5 ...

  6. Imperial units - Wikipedia

    en.wikipedia.org/wiki/Imperial_units

    The former Weights and Measures office in Seven Sisters, London (590 Seven Sisters Road). The imperial system of units, imperial system or imperial units (also known as British Imperial [1] or Exchequer Standards of 1826) is the system of units first defined in the British Weights and Measures Act 1824 and continued to be developed through a series of Weights and Measures Acts and amendments.

  7. Miniature Railway Company - Wikipedia

    en.wikipedia.org/wiki/Miniature_Railway_Company

    It had a diameter of 14 inches (0.36 m) and held 15 imperial gallons (68 L) of water. The tubes were 24 inches (0.61 m) long and the fire box was 16 inches (0.41 m) long. [11] The tender was of the two-truck type with 6 inches (150 mm) diameter wheels and had a length of 3 foot 6 inches (1.07 m) and a width of 22 inches (0.56 m).

  8. Rack unit - Wikipedia

    en.wikipedia.org/wiki/Rack_unit

    Rack with sample component sizes including an A/V half-rack unit. A rack unit (abbreviated U or RU) is a unit of measure defined as 1 + 3 ⁄ 4 inches (44.45 mm). [1] [2] It is most frequently used as a measurement of the overall height of 19-inch and 23-inch rack frames, as well as the height of equipment that mounts in these frames, whereby the height of the frame or equipment is expressed ...

  9. .380 ACP - Wikipedia

    en.wikipedia.org/wiki/.380_ACP

    Penetration depths from 6.5 to 17 inches (16.5 to 43.2 cm) are available for various applications and risk assessments. ... 9.0 in (228.6 mm) 2.38 cu in (39.0 cm 3 ...