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Anonymous
1/4 grain =15 mg1 grain = 60 mg
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I believe u divide 60 by 1.5 grains and get 40 mg
10 grains is 648 (647.99) mg
120mg is about 1.85gr
1500mg
100 ng = 1000 mg
17000mcg equals 17mg (1000mcg per mg).