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Number of grains in one ounceAvoirdupois (standard US and Imperial measure)

437.5 grains = 1 ounce

Troy (used for measuring precious metals)

480 grains = 1 ounce

NOTE Avoirdupoismeasure has 16 ounces to one pound while Troy has 12 ounces to one pound.

It is easy to confuse grains and grams. There are exactly 15.43234 grains in a gram. A grain is most most commonly used to measure gunpowder and bullets. There are precisely 7,000 grains in an Avoirdupois pound.

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13y ago

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