Convert Troy Pounds to Avoirdupois Drams
Convert Troy Pounds (lb t) to Avoirdupois Drams (dr av) instantly and accurately.
Conversion Formula
dr av = lb t × 210.6514286
About Troy Pounds
A troy pound (lb t) equals 12 troy ounces or 5,760 grains - approximately 373.24 grams. It is lighter than the common avoirdupois pound (453.59 g) because the troy system divides the pound into 12 ounces rather than 16. Historically used across Europe for trade in precious metals and pharmaceuticals, the troy pound was the legal standard in England from the 15th century until 1878. In the United States, the troy pound was once the official standard for coinage but was abolished for commercial use in 1828.
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 While rarely used in modern commerce (having been replaced by grams in most applications), the avoirdupois dram still appears in some spice and herbalist contexts, in US gunpowder loading data (where charges are specified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
| Troy Pounds (lb t) | Avoirdupois Drams (dr av) |
|---|---|
| 1 lb t | 210.651 dr av |
| 2 lb t | 421.303 dr av |
| 5 lb t | 1053.26 dr av |
| 10 lb t | 2106.51 dr av |
| 25 lb t | 5266.29 dr av |
| 50 lb t | 10532.6 dr av |
| 100 lb t | 21065.1 dr av |