Grams to Ounces Converter

Converting grams to ounces means dividing by 28.349523125, the exact number of grams in an avoirdupois ounce. That figure follows from the pound being defined as 0.45359237 kilograms and containing sixteen ounces, so like the other conversions in this family it is exact by definition rather than measured.

Cooking is overwhelmingly the reason people need this conversion. European and Australian recipes specify dry ingredients by mass in grams, while American recipes use ounces and volume measures like cups. Following a recipe across that divide means converting, and the numbers that recur are worth knowing: 100 g is 3.53 oz, 250 g is 8.82 oz, and 500 g is 17.64 oz. A pound, at 453.59 g, is the point where recipes often switch notation.

The far more consequential issue in cooking is not this conversion but the difference between mass and volume. A fluid ounce measures volume and an ounce measures mass, and they are not interchangeable despite sharing a name. One cup of flour weighs roughly 120 to 125 grams while one cup of sugar weighs about 200 grams, because the ingredients have different densities. Any conversion between a cup measurement and a gram measurement therefore depends entirely on what is being measured. This is a large part of why baking recipes written by mass are more reliable than those written by volume — flour in particular can vary by twenty per cent depending on whether it was scooped or spooned into the cup.

For anything where precision matters, especially baking, working in grams throughout and using a digital scale removes the problem entirely rather than converting repeatedly between systems.