Grain is a unit used in mass conversions and practical measurement work.
The grain originated as the mass of a single cereal seed. It is the one unit shared by the avoirdupois, troy and apothecaries' systems and is defined as exactly 64.79891 mg; it is still used for bullets, arrows and medicines.
Measurement system: Metric, customary and historical mass-measurement usage. SI equivalent: 1 gr = 0.00006479891 kg.
Grain facts
- Unit name
- Grain
- Symbol
- gr
- Category
- Mass
- Measurement system
- Metric, customary and historical mass-measurement usage
- SI equivalent
- 1 gr = 0.00006479891 kg
- Common uses
- Products, material quantities, scientific work and trade
Definition of the grain
Grain is a unit used in mass conversions and practical measurement work.
Measurement system and SI relationship
Metric, customary and historical mass-measurement usage
SI equivalent: 1 gr = 0.00006479891 kg
History of the grain
The grain originated as the mass of a single cereal seed. It is the one unit shared by the avoirdupois, troy and apothecaries' systems and is defined as exactly 64.79891 mg; it is still used for bullets, arrows and medicines.
Where is the grain used?
Products, material quantities, scientific work and trade