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1 troy ounce = 31.10 grams
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1 troy ounce = 480 grains
1 troy ounce = 31.1034768 grams so the troy ounce is bigger
1 ounce = 0.91146 troy oz
One troy ounce of what? A troy ounce is a measurement just like an inch, gram, kilogram, ton, etc.
20dwt per troy ounce.