"Officially, in the US, 1 pound is defined as 0.45359237 kilograms. A foot is defined as 0.3048 meters...[As of today, the kilogram is being redefined in terms of Planck's constant, which we only recently measured accurately enough to derive kilograms from it to an acceptable level of accuracy:]The kilogram, symbol kg, is the SI unit … Continue reading New Kilogram Standard