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  2. Orders of magnitude (length) - Wikipedia

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

    2.54 cm – 1 inch; 3.08568 cm – 1 attoparsec; 3.4 cm – length of a quail egg [112] 3.5 cm – width of film commonly used in motion pictures and still photography; 3.78 cm – amount of distance the Moon moves away from Earth each year [113] 4.3 cm – minimum diameter of a golf ball [114] 5 cm – usual diameter of a chicken egg

  3. ANSI/ASME Y14.1 - Wikipedia

    en.wikipedia.org/wiki/ANSI/ASME_Y14.1

    A size chart illustrating the ANSI sizes. In 1992, the American National Standards Institute adopted ANSI/ASME Y14.1 Decimal Inch Drawing Sheet Size and Format, [1] which defined a regular series of paper sizes based upon the de facto standard 8 + 1 ⁄ 2 in × 11 in "letter" size to which it assigned the designation "ANSI A".

  4. List of rail transport modelling scale standards - Wikipedia

    en.wikipedia.org/wiki/List_of_rail_transport...

    A worldwide garden railroad scale. Corresponds to NEM III and NMRA 3 ⁄ 4 inch. -1:12: 4 + 3 ⁄ 4 in (121 mm) North America specific scale corresponding to NMRA 1-inch scale. 1:12 is one of the most popular backyard railway scales. -1:11: 5 in (127 mm) Used outside North America. Corresponds to NEM V. One of the most popular garden railway ...

  5. Hand (unit) - Wikipedia

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

    To convert inches to hands, the number in inches is divided by four, then the remainder is added after the radix point. Thus, a horse that measures 60 inches is 15 hands high (15 × 4 = 60) and a horse halfway between 15 and 16 hands is 15.2 hands, or 62 inches tall (15 × 4 + 2 = 62) [ 5 ] [ 7 ] Because the subdivision of a hand is a base 4 ...

  6. List of drill and tap sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

    The major minus pitch technique also works for inch-based threads, but you must first calculate the pitch by converting the fraction of threads-per-inch (TPI) into a decimal. For example, a screw with a pitch of 1/20 in (20 threads per inch) has a pitch of 0.050 in and a 1 ⁄ 13 in pitch (13 threads per inch) has a pitch of 0.077 in.

  7. List of metric units - Wikipedia

    en.wikipedia.org/wiki/List_of_metric_units

    The statsiemens or statmho is a unit of electric conductance equal to 1 statA/statV, corresponding to ~ 1.112 646 pS. [6] The stathenry is a unit of electric inductance equal to 1 statV·s/statA, corresponding to ~ 898.755 1787 GH. [7] [6] [a] The statfarad (statF) is a unit of electric capacitance equal to 1 statC/statV, corresponding to ~ 1. ...

  8. Metre - Wikipedia

    en.wikipedia.org/wiki/Metre

    The metre (or meter in US spelling; symbol: m) is the base unit of length in the International System of Units (SI). Since 2019, the metre has been defined as the length of the path travelled by light in vacuum during a time interval of ⁠ 1 / 299 792 458 ⁠ of a second, where the second is defined by a hyperfine transition frequency of caesium.

  9. Inch - Wikipedia

    en.wikipedia.org/wiki/Inch

    A fire hydrant marked as 3-inch. The inch (symbol: <3 or ″) is a unit of length in the British Imperial and the United States customary systems of measurement.It is equal to ⁠ 1 / 36 ⁠ yard or ⁠ 1 / 12 ⁠ of a foot.