![]() ![]() Exceptions are made if the unit is commonly known by another name (for example, 1 micron = 10 −6 meter). Nominal values are sometimes allowed and used.Ĭonversion between units in the metric system can be discerned by their prefixes for example, 1 kilogram = 1000 grams, 1 milligram = 0.001 grams) and are thus not listed in this article. It sometimes involves a slightly different configuration, or size substitution, of the item. It changes the measurement to convenient and workable numbers and units in the new system. It does not involve changing the physical configuration of the item being measured.īy contrast, a hard conversion or an adaptive conversion may not be exactly equivalent. ![]() This is sometimes called soft conversion. Some conversions from one system of units to another need to be exact, without increasing or decreasing the precision of the first measurement. The intended use of the measurement including the engineering tolerances.The number of significant figures of the measurement.The statistical confidence interval or tolerance interval of the initial measurement.The precision and accuracy of measurement and the associated uncertainty of measurement.Engineering judgment may include such factors as: This may be governed by regulation, contract, Technical specifications or other published standards. The process of conversion depends on the specific situation and the intended purpose. 3.1 General commercial sources of converters.2.24 Electromotive force, electric potential difference.
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