Grains to Grams Converter
Precision converter for grains (gr) to grams (g), essential for ammunition reloading, ballistics, and archery. High-accuracy calculations with safety disclaimers.
About
The grain (gr) is a unit of mass that, while ancient, remains the standard in highly specific fields like ballistics, ammunition reloading, and archery. For professionals and hobbyists in these areas, converting between grains and grams (g) is not a matter of simple preference, it is a matter of safety and performance. The weight of bullets, arrowheads, and, most critically, gunpowder charges are measured in grains. An inaccurate conversion can lead to dangerous pressure levels in a firearm or inconsistent arrow flight.
This tool is built for the precision required in these applications. It provides high-accuracy conversions and includes features relevant to the user, such as a quick-swap button to reverse the calculation and a high-value warning to prevent potentially catastrophic data entry errors. It is designed to be a reliable digital companion on the reloading bench or in the workshop.
Formulas
The conversion is defined by an exact factor established by international agreement.
To convert from grams to grains, the inverse operation is used:
Reference Data
| Grains (gr) | Grams (g) | Common Application |
|---|---|---|
| 6 gr | 0.389 g | Typical powder charge for a .380 ACP pistol round |
| 55 gr | 3.564 g | Common bullet weight for .223 Remington / 5.56mm NATO |
| 100 gr | 6.480 g | Standard arrowhead (broadhead) weight for hunting |
| 150 gr | 9.720 g | Common bullet weight for .308 Winchester rifle |
| 230 gr | 14.904 g | Standard bullet weight for .45 ACP |
| 700 gr | 45.359 g | Bullet weight for very large caliber rifles like .50 BMG |
| 7000 gr | 453.592 g | Exactly equal to one Avoirdupois pound |