Convert Grains to Avoirdupois Drams
Convert Grains (gr) to Avoirdupois Drams (dr av) instantly and accurately.
Conversion Formula
dr av = gr × 0.03657142857
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 Avoirdupois Drams
An avoirdupois dram (dr av) is 1/16 of an avoirdupois ounce - approximately 1.772 grams. Part of the avoirdupois system that governs everyday trade weights in the UK and US, it was historically used to measure small quantities of goods and spices in commerce. While rarely used in modern commerce (having been replaced by grams in most applications), the avoirdupois dram still appears in some spice and herbalist contexts, in US gunpowder loading data (where charges are specified in grains and drams), and in archaic recipe books.
Quick Reference Table
| Grains (gr) | Avoirdupois Drams (dr av) |
|---|---|
| 1 gr | 0.0365714 dr av |
| 2 gr | 0.0731429 dr av |
| 5 gr | 0.182857 dr av |
| 10 gr | 0.365714 dr av |
| 25 gr | 0.914286 dr av |
| 50 gr | 1.82857 dr av |
| 100 gr | 3.65714 dr av |