one grain in the apothecary system is equal to 64.8 mg. however, it is rounded off to 60mg or 65mg
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gr is the abbreviation for the apothecary measurement grain VIISS is 7 1/2 (the Roman Numeral for 7 is VII and Roman Numeral for 1/2 is SS) There are 60mg (milligrams) is one grain, therefore.....gr VIISS = 450mg
In the American-based system, 1,000,000,000,000,000 would equal one quadrillion. In the Traditional British system, this would be equal to one thousand billion.
According to the American number system, one trillion is equal to one million million, or 1,000,000,000,000. According to the Commonwealth number system, one trillion is equal to one million million million, or 1,000,000,000,000,000,000.
In the more widely-used, American system, one billion is equal to 1,000,000,000, or one thousand million.In the Commonwealth system, more common in Continental Europe and in old times in England, one billion is equal to 1,000,000,000,000, or one million million.
(1/8) grain = 8.09986375 milligrams FYI: Google "convert 1/8 grain to milligrams"