Ounces to Grams

About this conversion

The ounce is where baking meets the metric world most directly. American recipes call for 8 ounces of chocolate and 4 ounces of butter, while kitchen scales in Canada, France and almost everywhere else read grams, so every foreign kitchen cooking from an American book converts first. Nutrition labels repeat the split: US labels list serving sizes in ounces and grams side by side precisely because shoppers need both. Coffee bags, cheese blocks and steak cuts follow the same pattern, with the ounce as the retail unit and the gram as the science unit. One trap deserves a warning: a fluid ounce measures volume, not weight, and is a different unit entirely. The weight ounce used here is fixed at exactly 28.349523125 grams, so conversions are exact rather than rounded. The table below lists the quantities that appear on packages, scales and recipe cards most often.

Quick reference

Common values at a glance

Real-world example

Questions & answers

Frequently asked questions