Convert Ounces to Avoirdupois Drams
Convert Ounces (oz) to Avoirdupois Drams (dr av) instantly and accurately.
Conversion Formula
dr av = oz × 16
About Ounces
The avoirdupois ounce (oz) is 1/16 of a pound, equal to approximately 28.35 grams. It is the everyday ounce used in the United States and United Kingdom for food portions, household quantities, and general trade. US food packages, recipe measurements, and nutrition labels reference ounces; a standard stick of butter is 4 oz, a can of soup typically 10.75 oz, and a baseball weighs 5-5.25 oz. Unlike the troy ounce (31.10 g) used for precious metals, the avoirdupois ounce (28.35 g) is lighter.
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 While rarely used in modern commerce (having been replaced by grams in most applications), the avoirdupois dram still appears in some spice and herbalist contexts, in US gunpowder loading data (where charges are specified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
| Ounces (oz) | Avoirdupois Drams (dr av) |
|---|---|
| 1 oz | 16 dr av |
| 2 oz | 32 dr av |
| 5 oz | 80 dr av |
| 10 oz | 160 dr av |
| 25 oz | 400 dr av |
| 50 oz | 800 dr av |
| 100 oz | 1600 dr av |