Convert Pounds to Apothecary Ounces
Convert Pounds (lb) to Apothecary Ounces (oz ap) instantly and accurately.
Conversion Formula
oz ap = lb × 14.58333333
About Pounds
The avoirdupois pound (lb) is the primary unit of weight in the United States and United Kingdom for everyday use, equal to 16 ounces or exactly 453.59237 grams. It dominates American life: body weight, grocery produce, deli counter cuts, freight shipping costs, gym weights, and building material quantities are all measured in pounds and ounces. American recipes use pounds for meat and large quantities. The pound derives from the Roman 'libra pondo' (a pound by weight) - hence both the symbol 'lb' (from libra) and the British currency symbol '£'.
About Apothecary Ounces
An apothecary ounce (oz ap) is identical in mass to the troy ounce - approximately 31.10 grams - and equals 8 apothecary drams or 480 grains. It was the standard ounce used by pharmacists and physicians across Europe and North America from medieval times until the 20th century. Although the apothecary system has been replaced by SI units in modern medicine, the apothecary ounce still appears in historical pharmacopeias, traditional herbal medicine texts, and some compounding pharmacy references.
Quick Reference Table
| Pounds (lb) | Apothecary Ounces (oz ap) |
|---|---|
| 1 lb | 14.5833 oz ap |
| 2 lb | 29.1667 oz ap |
| 5 lb | 72.9167 oz ap |
| 10 lb | 145.833 oz ap |
| 25 lb | 364.583 oz ap |
| 50 lb | 729.167 oz ap |
| 100 lb | 1458.33 oz ap |