Convert Grains to Grams
Convert Grains (gr) to Grams (g) instantly and accurately.
Conversion Formula
g = gr × 0.06479891
About Grains
A grain (gr) is the smallest unit in both the avoirdupois and troy weight systems, equal to exactly 64.79891 milligrams. Originally defined as the mass of a single grain of barley or wheat from the middle of an ear, it has been a standard of weight since ancient times. Today, grains are used to weigh gunpowder charges and bullets (a standard .308 rifle bullet weighs 168 gr), pharmaceutical preparations in apothecary compounding, and the fineness of gold alloys. Arrowhead and fishing hook weights are also specified in grains.
About Grams
The gram (g) is the basic metric unit of mass, equal to one thousandth of a kilogram. It is universally used in cooking, nutrition, postal services, and scientific measurement. Almost all food packaging worldwide shows nutritional information per 100 g. A US nickel coin weighs exactly 5 g, a teaspoon of sugar about 4 g, and a standard paperclip approximately 1 g. In chemistry, the gram is central to molar mass: one mole of carbon-12 atoms weighs exactly 12 g. Postal rates are typically scaled per gram or per 100 g.
Quick Reference Table
| Grains (gr) | Grams (g) |
|---|---|
| 1 gr | 0.0647989 g |
| 2 gr | 0.129598 g |
| 5 gr | 0.323995 g |
| 10 gr | 0.647989 g |
| 25 gr | 1.61997 g |
| 50 gr | 3.23995 g |
| 100 gr | 6.47989 g |