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. Historical definitions of the units and their derivatives used in old measurements e.g., international foot vs.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. Unit conversion is often easier within the metric or the SI than in others, due to the regular 10-base in all units and the prefixes that increase or decrease by 3 powers of 10 at a time. ![]() Conversion of units is the conversion between different units of measurement for the same quantity, typically through multiplicative conversion factors which change the measured quantity value without changing its effects.
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