Question: what is the difference between grain and gram?
Answer: 1 gram (g) = 15.4323584 grains or "troy grains" (gr) = 1000000 microgram (mcg or µg) = 1000 milligram (mg) = 0.001 kilogram (kg) = 0.0352739619 ounces (oz) = 0.00220462262 pounds (lb). The grain or "troy grain" (gr) is the non-metric unit of mass used in the Imperial and U.S. customary units.