Convert Ounces to Scruples
Convert Ounces (oz) to Scruples (s ap) instantly and accurately.
Conversion Formula
s ap = oz × 21.875
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 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.
Quick Reference Table
| Ounces (oz) | Scruples (s ap) |
|---|---|
| 1 oz | 21.875 s ap |
| 2 oz | 43.75 s ap |
| 5 oz | 109.375 s ap |
| 10 oz | 218.75 s ap |
| 25 oz | 546.875 s ap |
| 50 oz | 1093.75 s ap |
| 100 oz | 2187.5 s ap |