Business & Finance
Units of Measure

20 pounds to troy ounces?

Answer

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Wiki User
11/08/2009

First, know the difference between troy pound and the regular every day avoirdupois pound that is used in all US and British systems other than precious metal calculation.

1 avoirdupois pound (lb) = 453.6 grams

1 troy pound (troy lb) = 373.2 grams

Second, 20 lbs * 453.6 grams/lb = 9072 grams

Third, 9072 grams divided by 31.10135 grams/troy ounce = 291.7 troy ounces

Thus 20 lb = 291.7 troy ounces

EXTRA CREDIT: 1 troy pound = 12 troy ounces

so 291.7 troy ounces divided by 12 troy ounces/1 troy pound = 24.3083 troy pounds

THUS..... 20 avoirdupois lb = 291.7 troy ounces = 24.3083 troy pounds

291.7 troy ounces @ $1136.85 USD per TROY Oz.= $331619.145 USD