The ounce to gram conversion is commonly needed in cooking, baking, postal services, and jewelry. One avoirdupois ounce (the standard ounce for weight) equals 28.3495 grams. This converter is especially useful when adapting recipes between US and metric measurements, weighing packages for shipping, and measuring precious metals or gemstones.
Ounces to Grams: Multiply ounces by 28.3495. Grams to Ounces: Multiply grams by 0.035274. Quick estimate: multiply oz by 28 for a rough gram value. Note: troy ounces (for precious metals) are different: 1 troy oz = 31.1035 g.
Enter a value in ounces or grams and click Convert. The result shows precise conversion with a reference table.
One avoirdupois ounce equals 28.3495 grams. For quick math, use 28 grams per ounce.
A fluid ounce (fl oz) measures volume (about 29.57 ml). A weight ounce (oz) measures mass (28.35 g). They are not interchangeable except for water, where they are approximately equal.
A troy ounce equals 31.1035 grams, used exclusively for precious metals (gold, silver, platinum). It is about 10% heavier than a regular (avoirdupois) ounce.