Grams to Ounces Calculator

Grams and ounces represent the same physical property — mass — but belong to different measurement systems used by different parts of the world. The gram is the metric standard used in virtually every country for food labeling, pharmaceutical dosing, and scientific measurement. The ounce is the everyday unit in the United States for food portions, nutrition labels, produce pricing, and postal rates. Converting between them is a daily need for cooks following international recipes, nutritionists translating foreign food data, importers comparing product weights across markets, and hobbyists working with ingredients labeled in grams. One avoirdupois ounce equals exactly 28.349523125 grams, so the conversion is an exact multiplication. This calculator multiplies any gram value by 0.035274 and returns ounces to four decimal places.

Ounces = Grams × 0.035274. The conversion factor 0.035274 is derived from the exact definition of the avoirdupois ounce: 1 ounce = 28.349523125 grams exactly, so 1 gram = 1/28.349523125 oz ≈ 0.035274 oz. The calculator uses this rounded constant, which introduces an error of less than 0.0001% — negligible for cooking, nutrition, or shipping. The result distinguishes dry ounces (avoirdupois weight) from fluid ounces, which measure volume and are not the same. A fluid ounce of water weighs approximately 29.57 grams, while an avoirdupois ounce weighs 28.35 grams — close but not identical. This calculator performs the weight (avoirdupois) conversion only.