Convert Ounce (oz) to Grain (gr) instantly.
Ounce to Grain conversion
1 Ounce (oz) = 437.50007 Grain (gr). To convert Ounce to Grain, multiply the value by 437.50007.
| Ounce (oz) | Grain (gr) |
|---|---|
| 1 | 437.50007 |
| 2 | 875.00013 |
| 5 | 2187.5003 |
| 10 | 4375.0007 |
| 25 | 10937.502 |
| 50 | 21875.003 |
| 100 | 43750.007 |
| 1000 | 437500.07 |
Frequently asked questions
How many Grain are in one Ounce?
One Ounce (oz) equals 437.50007 Grain (gr).
How do I convert Ounce to Grain?
To convert Ounce to Grain, multiply the value by 437.50007.
What is 10 Ounce in Grain?
10 Ounce = 4375.0007 Grain.
About these units
Ounce (oz)
The ounce is a unit equal to 1/16 of a pound, or approximately 28.3495 grams, with roots in ancient Roman "uncia"—one-twelfth of a pound. The ounce is used for measuring small masses in cooking, postal services, gemstones (troy ounces), and various consumer goods. Despite not being part of the metric system, the ounce remains a staple in US everyday life, from food packaging to hardware components. Its small size gives it a practical niche where grams might feel too unfamiliar for some audiences. Multiple ounce variants exist historically—avoirdupois, troy, apothecary—but the avoirdupois ounce is now the standard in general commerce. Its endurance reflects the cultural weight of imperial units and the long history of Western measurement systems.
Grain (gr)
The grain, defined as exactly 64.79891 milligrams, is one of the oldest units of mass still in limited use today. Derived from the weight of average cereal grains such as barley or wheat, it became a universal tiny unit used across Europe for coins, medicine, and gunpowder. The grain persists in firearms and ammunition manufacturing because bullet weights are still listed in grains (e.g., a "150-grain bullet"). Reloaders and ballistic engineers rely on the grain as a fine unit suitable for measuring powder charges and projectile masses. It is also used in traditional gold and silver transactions, linking it to the troy system. The grain's longevity highlights how ancient agrarian measures can remain embedded in modern technological practices.