is g the same as gr?
One gram is equal to one thousandth of the kilogram (kg), which is the current SI (Metric system) base unit of mass. 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).