A grain of salt equals 1 milligram?

Answer 1

A grain of salt does not equal 1 milligram; rather, it is approximately 58 milligrams. This discrepancy arises from the historical use of the grain as a unit of measurement in the apothecaries' system, where 1 grain is defined as 1/7000th of a pound. In contrast, the metric system defines 1 milligram as 1/1000th of a gram. Therefore, a grain of salt is significantly larger than 1 milligram.

Answer 2

Id say a milligram of salt equals a milligram. A grain of salt is rediculously small, way smaller than a milligram, about 100 Micrograms