The conversion factor for weight units ounces to grams is 28.3495231. If the conversion is from troy ounces (for precious metals, gold, jewellery etc), it is 31.1034768. To find out how many grams in ounces, multiply by the conversion factor or simply use the converter below.

**1 Ounce = 28.3495231 Grams**

**1 Troy Ounce = 31.1034768 Grams**
**Ounce** is a unit of mass (weight) in united states customary and imperial measurement systems. It is also used as a volume unit but then simply meant as "fluid ounces" which equals to about 30 milliliters in U.S. customary system. The international avoirdupois oz is commonly used daily basis and the troy oz is used for the measurement of precious metals, gemstones, silver etc. The abbreviation is "**oz**".

**Gram** is a unit of mass in metric system and defined to be the 1/1000 of a kilogram which is the metric base unit of mass. It's used commonly in cooking recipes and drug measurements. The abbreviation is "**g**".

For **grams to ounces** converter, please go to grams to ounces

For other weight units conversion, please go to

Weight Conversion