Grams to ounces

Baking is the most common trigger for this conversion: a European or Australian recipe listing flour and sugar in grams needs converting for a kitchen scale that only shows ounces, and precious-metal or coffee-bean weights are frequently quoted in grams even in countries that otherwise use ounces for everyday cooking. A stick of butter, 4 ounces by US convention, is about 113.4 grams, a figure worth keeping handy since butter shows up in so many converted recipes.

Pet food and feeding guides raise the same conversion in a different kitchen context: many vet-recommended portion sizes and pet food labels outside the US are given in grams, while US packaging and measuring cups default to ounces, so a dog or cat's daily feeding amount often needs converting between the two before it matches what a US-bought scoop or scale actually measures.

The gram is one-thousandth of the kilogram, the SI base unit of mass, while the ounce used here is the standard avoirdupois ounce, defined as exactly 28.349523125 grams — a relationship fixed by definition rather than measured.

Multiply a gram value by 0.03527396195 to get ounces:

oz = g × 0.03527396195

One gram converts to 0.035274 ounce. 100 grams, a common recipe quantity, converts to 3.527396 ounces. And 1,000 grams — one kilogram — converts to 35.273962 ounces, a bit over two pounds, a handy anchor when a bulk ingredient's packaging switches between grams and ounces mid-recipe.

Kitchen scales rarely display more than one decimal place, and that's plenty for cooking — the difference between 3.5 and 3.527396 ounces of flour won't change a recipe's outcome. Jewelry, lab work, and precious-metal weighing, by contrast, often need three or four decimal places, since small gram-level differences translate to real value at that scale.

A common mistake is confusing this standard ounce with the troy ounce used for gold, silver, and other precious metals, which is heavier at about 31.1034768 grams. Using the standard ounce factor on a gram weight of gold understates its troy-ounce value by close to 10%, an error that matters a great deal when the metal is being priced or sold.