Convert Catties to Apothecary Ounces
Convert Catties (catty) to Apothecary Ounces (oz ap) instantly and accurately.
Conversion Formula
oz ap = catty × 19.41905093
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).
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 Although the apothecary system has been replaced by SI units in modern medicine, the apothecary ounce still appears in historical pharmacopeias, traditional herbal medicine texts, and some compounding pharmacy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
| Catties (catty) | Apothecary Ounces (oz ap) |
|---|---|
| 1 catty | 19.4191 oz ap |
| 2 catty | 38.8381 oz ap |
| 5 catty | 97.0953 oz ap |
| 10 catty | 194.191 oz ap |
| 25 catty | 485.476 oz ap |
| 50 catty | 970.953 oz ap |
| 100 catty | 1941.91 oz ap |