Stones
A stone is a unit of weight equal to 14 pounds averdupois (or international lbs). By turn, this makes a stone equivalent to 6.35029kg.
dwt =
st * 4083.3
Pennyweights
A measure of Troy weight equalling 24 grains or the twentieth part of a Troy ounce (there are 12 ounces in a pound Troy). Pennyweight is usually abbreviated dwt.
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