Section of a yellow tape measure using the superior metric system unit of standard measurement. Measurement conversions include weight, mass, length, volume, and temperature. Our handy conversion tables below show you the formulas to convert from metric system measurements to the imperial system and visa versa allowing you to do your own calculations for the conversion you need. 1 British Imperial gallon = 1.201 U.S.They were very similar, but not identical, to the units that are still predominantly used in the United States. Imperial units are the measurement units that were historically used in the British Commonwealth countries. Americans frequently spell 'metre' as 'meter', and 'litre' as 'liter' however 'metre' and 'litre' are the official BIPM names for these units. It is believed that the system was transmitted to France from England via the likes of Benjamin Franklin. The metric system, and metre was first fully described by Englishman John Wilkins in 1668 in a treatise presented to the Royal Society some 120 years before the French adopted the system. Fractions of a decimal unit are rarely used. The metric system is a decimalised system of measurement in the sense that all multiples and sub-multiples of the base units are factors of powers of ten of the unit.
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Conversely, a large number in AWG equates to a very small number of mm.ĪWG sizes do not fit perfectly into mm or inches, so you may need to round up or down when safe to do so.Ĭable sizes (including AWG) refer to the size of the conductor, not the total thickness of the cable including sheathing etc.ĭo not confuse AWG (American Wire Gauge) with SWG (Standard Wire Gauge, the now largely redundant British Imperial standard which was superseded by mm.) as they are not equal. Wire Gauges run low to high - this means that the smaller a gauge number, the larger it is in mm.
For audio, video, telephone, security cabling you may want to use smaller cables sizes where the voltage and current are smaller. AWG #įor AWG 23 and upwards - When using a cable to power mains voltages: (110v, 230v etc) the smallest conductor we recommend is 0.5mm. Somehow we don't see ourselves nonchalantly calculating this in our heads every time we speak with an American customer, so we've made up a conversion table which we'd like to share for your convenience. The n gauge wire diameter dn in millimetres (mm) is equal to 0.127mm times 92 raised to the power of 36 minus gauge number n, divided by 39: dn (mm) = 0.127 mm × 92(36-n)/39 If you want the technical formulae for converting between the two, it is as follows Unfortunately, AWG does not fit comfortably in rounded mm or inches, so there will always need to be a small amount of rounding up or down depending on your need or purpose. The AWG standard was officially adopted & implemented as industry-standard sizing in 1857. What is AWG? The AWG standard was created by the Brown & Sharpe Company, a leading manufacturer of machinist technology in the late 1800s & early 1900s.
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Vice Versa, American buyers may be stumped when they are recommended a certain gauge of cable or wire, and don't know how to get it when confronted with mm. When buying cut to length electrical wire or electrical cable, many UK and international buyers face difficulty when confronted with AWG sizing.
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