Ounces to Grams Converter

Enter a mass in ounces to see grams. Uses the avoirdupois ounce from cooking and shipping labels.

How it works

Each avoirdupois ounce is defined as 28.349523125 grams (1/16 of the international pound). Multiplying ounces by that figure yields grams. A cup-style 8 oz portion is 226.7962 g. Fluid ounces measure volume, not mass — they do not belong on this page.

Formula

grams = ounces × 28.349523125

Worked examples

1 oz → 28.3495 g
8 oz → 226.7962 g

Useful notes

Weight ounces, not US fluid ounces. For liquid volume use ML to US Fluid Ounces.

FAQ

How many grams are in an ounce?: Exactly 28.349523125 grams for an avoirdupois ounce.
Are fluid ounces the same?: No. A US fluid ounce is a volume (about 29.57 mL of water). This converter is for mass.
How many grams in a pound?: A pound is 16 ounces, so 453.59237 g. The LBS to KG tool is built for that.

Related tools

LBS to KG
ML to US Fluid Ounces

See all Conversions tools.