Convert Apothecary Ounces to Grams
Convert Apothecary Ounces (oz ap) to Grams (g) instantly and accurately.
Conversion Formula
g = oz ap × 31.1034768
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 Although the apothecary system has been replaced by SI units in modern medicine, the apothecary ounce still appears in historical pharmacopeias, traditional herbal medicine texts, and some compounding pharmacy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 Grams
The gram (g) is the basic metric unit of mass, equal to one thousandth of a kilogram. It is universally used in cooking, nutrition, postal services, and scientific measurement. Almost all food packaging worldwide shows nutritional information per 100 g. A US nickel coin weighs exactly 5 g, a teaspoon of sugar about 4 g, and a standard paperclip approximately 1 g. In chemistry, the gram is central to molar mass: one mole of carbon-12 atoms weighs exactly 12 g. Postal rates are typically scaled per gram or per 100 g.
Quick Reference Table
| Apothecary Ounces (oz ap) | Grams (g) |
|---|---|
| 1 oz ap | 31.1035 g |
| 2 oz ap | 62.207 g |
| 5 oz ap | 155.517 g |
| 10 oz ap | 311.035 g |
| 25 oz ap | 777.587 g |
| 50 oz ap | 1555.17 g |
| 100 oz ap | 3110.35 g |