Six grains = about 0.388 grams.
If a grain is about 60 mg, then 10 grains of cocaine would be about 600 mg or .6 grams, quite a decent amount for sure...
15 grains = about 0.971 grams.
185 grains = about 11.987 grams.
3.5 grams = about 54.013 grains.
There are approximately 15,432 grains in 500 grams.
0.9 grams=39 grains more at freerice.com
35.2 grains is equivalent to approximately 2.28 grams.
800 grains = about 51.839 grams.
30 grains = about 1.943 grams.
3.9 grams : 60.18 grains
22.679 grams = 350 grains
200 grains = about 12.959 grams.