Question: what is the difference between a pound and a troy pound?
Answer: A Troy ounce has 31.10 grams, unlike the Avoirdupois ounce which has 28.35 grams. And there are 12 Troy ounces in every Troy pound, and 16 ounces in every Avoirdupois pound. Furthermore, even though there are more grams in 1 Troy ounce, a Troy pound is lighter than 1 Avoirdupois pound (lb.): ... x 28.35grams = 453.60grams.