Grain (gr)
The grain is used in ballistics, historical pharmacy, and some jewelry measurements.
History: the grain comes from the mass of a barley or wheat grain and survives in ballistics and old apothecary measures.
Quickly convert grains to milligrams without lookup tables or manual math.
This page is focused on converting grains to milligrams. Type a number into the first field and the result appears immediately in the second field.
Example: 1 gr = 64.79891 mg. Conversion formula: result = value × 6.479891E-5 / 1.0E-6.
Use this converter for everyday calculations, study notes, engineering checks, and quick value verification without installing a separate app.
The grain is used in ballistics, historical pharmacy, and some jewelry measurements.
History: the grain comes from the mass of a barley or wheat grain and survives in ballistics and old apothecary measures.
The milligram is used for medicine doses, chemistry, vitamins, and very small masses.
History: the milligram became a decimal fraction of the gram and found wide use in pharmacy and chemistry.
Enter a value in the Grain field. The converter applies the formula "result = value × 6.479891E-5 / 1.0E-6" and immediately shows the result in milligrams.
1 gr = 64.79891 mg.
Yes. Use the swap button or choose the reverse pair from the full conversion list.