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How to convert Hundredweight US to Atomic Mass Unit (cwt US to u)? 1 cwt US = 2.7315952379422E+28 u. 1 x 2.7315952379422E+28 u = 2.7315952379422E+28 Atomic Mass Unit. Always check the results; rounding errors may occur.
Definition: In relation to the base unit of [mass weight] => (kilograms), 1 Hundredweight US (cwt US) is equal to 45.359237 kilograms, while 1 Atomic Mass Unit (u) = 1.660540199E-27 kilograms.