Convert Apothecary Ounces to Catties
Convert Apothecary Ounces (oz ap) to Catties (catty) instantly and accurately.
Conversion Formula
catty = oz ap × 0.05149582252
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 Although the apothecary system has been replaced by SI units in modern medicine, the apothecary ounce still appears in historical pharmacopeias, traditional herbal medicine texts, and some compounding pharmacy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.
About Catties
The catty (also jin 斤 in Chinese) is a traditional unit of mass used across East and Southeast Asia, equal to 600 grams in its modern metric form. It was historically the standard unit of trade for goods at markets throughout China, Japan, Korea, and Southeast Asia for over a thousand years. Today the catty remains widely used in Chinese, Vietnamese, Malaysian, and Singaporean wet markets and grocery stores for weighing vegetables, meat, and fish. In Hong Kong, the catty (斤) is precisely 604.79 grams; in mainland China it is exactly 500 grams (half a kilogram).
Quick Reference Table
| Apothecary Ounces (oz ap) | Catties (catty) |
|---|---|
| 1 oz ap | 0.0514958 catty |
| 2 oz ap | 0.102992 catty |
| 5 oz ap | 0.257479 catty |
| 10 oz ap | 0.514958 catty |
| 25 oz ap | 1.2874 catty |
| 50 oz ap | 2.57479 catty |
| 100 oz ap | 5.14958 catty |