How Many Grams in an Ounce? 1 oz = 28.3495 g
1 avoirdupois ounce = 28.3495 grams. Quick answer for recipes and labels, plus formula, examples, and links to free oz ↔ g converters.
Question
How many grams are in an ounce?
1 ounce (oz) equals 28.3495 grams (g).
1 oz
28.3495 g
8 oz
≈ 226.796 g
Formula
grams = ounces × 28.3495
Category
Weight / mass
Explanation
For everyday weight and recipe conversions, “ounce” usually means the avoirdupois ounce used on kitchen scales and US food labels.
Multiply ounces by 28.3495 to get grams. Divide grams by 28.3495 to get ounces. Example: 8 oz ≈ 226.8 g.
Fluid ounces (fl oz) are volume, not weight — do not treat fl oz the same as oz when converting to grams unless you know the ingredient density.
Important caveat
Troy ounces (precious metals) and fluid ounces (volume) are different units. This answer is for avoirdupois weight ounces.