What weighs more; an ounce of feathers or an ounce of gold?

The gold weighs more. An ounce of feathers weighs 28.35 grams while an ounce of gold weighs 31.10 grams.

What weighs more; a pound of feathers or a pound of gold?

The feathers weigh more. A pound of feathers weighs 453.60 grams and a pound of gold weighs 373.20 grams.

Confused?

In the U.S., we use Troy ounces and pounds for measuring gems and precious metals and the Avoirdupois system for measuring everything else:

measurement system	weight of an ounce	ounces in a pound	weight of a pound	measures
Troy	31.1 g	12	373.2 g	precious metals, gemstones
Avoirdupois	28.35 g	16	453.6 g	everything else

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