They're the ones we use in the U.S. like feet and inches. There are other units no longer in common usage as well. There are rods which are equal to 5.5 yards (or 16.5ft). Surveyors use some units; links and chains in addition to yards, feet and miles. There are different units for weights and volume. Many are old and have fallen out of common usage, ex. gill = 4 fluid oz.
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A Customary Unit or non-SI unit is a measurement unit that is not part of the metric system. Customary units are mainly units of the Imperial system but they could be localised customary units - such as Gaj (for area) is South Asia.
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It depends on what you consider to be "customary" and what you wish to convert them to.
Fahrenheit, if you're talking about U.S. Customary units.
Customary Units