Convert Scruples to Troy Pounds
Convert Scruples (s ap) to Troy Pounds (lb t) instantly and accurately.
Conversion Formula
lb t = s ap × 0.003472222222
About Scruples
A scruple (s ap) is a unit of the apothecary weight system equal to 20 grains or approximately 1.296 grams. Derived from the Latin 'scrupulus' (a small sharp stone used as a counterweight), it was the basic dispensing unit in pre-metric pharmacy across Europe. The apothecary system divided the fluid ounce into 8 drams, each dram into 3 scruples, and each scruple into 20 grains - a hierarchy memorised by every 19th-century pharmacist.
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.
Quick Reference Table
| Scruples (s ap) | Troy Pounds (lb t) |
|---|---|
| 1 s ap | 0.00347222 lb t |
| 2 s ap | 0.00694444 lb t |
| 5 s ap | 0.0173611 lb t |
| 10 s ap | 0.0347222 lb t |
| 25 s ap | 0.0868056 lb t |
| 50 s ap | 0.173611 lb t |
| 100 s ap | 0.347222 lb t |