gr to mcg | Grain to Microgram Converter

Grain

The grain or troy grain (symbol: gr) is a unit of mass and it is exactly equal to 64.79891 milligrams. One gram is thus approximately equivalent to 15.43236 grains. The unit formerly used by jewellers to measure pearls, diamonds, and other precious stones, called the jeweller's grain or pearl grain, is equal to 1⁄4 carat (50 mg; 0.77 gr). The grain was also the name of a traditional French unit equal to 53.115 mg. In both British Imperial units and United States customary units, there are precisely 7,000 grains per avoirdupois pound, and 5,760 grains per troy pound or apothecaries' pound.

Microgram

In the metric system, a microgram is a unit of mass equal to one millionth (1×10⁻⁶) of a gram. The unit symbol is μg according to the International System of Units; the recommended symbol in the United States and United Kingdom when communicating medical information is mcg. In μg the prefix symbol for micro- is the Greek letter μ (Mu). The microgram is typically abbreviated 'mcg' in pharmaceutical and nutritional supplement labelling

gr to mcg | Grains to Micrograms Table