Ounces to Grams Converter
Convert ounces to grams, kilograms and pounds in one step.
How to use this ounces to grams
- 1Enter your weight in ounces — for fractional ounces, use decimals (e.g., 1.5 for one and a half ounces).
- 2The converter shows grams, kilograms, and pounds instantly.
- 3For adapting US recipes to a metric kitchen, the gram output shows precisely how much to weigh on a digital scale.
- 4For food nutrition labels, converting oz serving sizes to grams helps when using international nutritional databases.
- 5For postal and package weighing, convert ounce weights to grams for international shipping documentation.
- 6Remember: 16 ounces = 1 pound = 453.59 grams.
How it's calculated
g = oz × 28.3495. 1 oz = 28.3495 g.
About the Ounces to Grams
Ounces to grams is one of the most useful cooking conversions, bridging US recipes that express ingredients in ounces with metric kitchen scales that display grams. The conversion factor — 1 ounce = 28.3495 grams — is the number professional chefs and serious home cooks eventually memorize because it enables direct translation from US recipe measurements to precise metric weights.
The distinction between weight ounces (what this converter uses) and fluid ounces is a common source of confusion. When a US recipe calls for "8 ounces of cream cheese," it means 8 weight ounces (226.8 grams). When a recipe calls for "8 ounces of milk," it technically means 8 fluid ounces (236.6 ml by volume), though in practice 8 fluid ounces of milk weighs approximately 237 grams (slightly more than 8 weight ounces because milk is slightly denser than water). For solid ingredients, always use weight ounces; for liquid ingredients, volume measurement is usually more practical.
The relationship between ounces and pounds is the core of the US customary weight system: 16 ounces = 1 pound = 453.592 grams. This 16:1 ratio is why the US system is considered less intuitive than metric (where 1,000 grams = 1 kilogram, a clean 1,000:1 ratio). For everyday cooking, understanding that a half-pound of butter is 8 ounces = 226.8 grams, or that a pound of pasta is 16 ounces = 453.6 grams, provides the key reference points.
Precious metal pricing in everyday ounces vs troy ounces creates a specific conversion need. Gold and silver prices are quoted per troy ounce (31.1035 grams), but some buyers may have gold measured in standard ounces. Jewelry is often expressed in grams, while gold bars and bullion coins are in troy ounces. Converting between these requires clarity on which ounce is being referenced — this calculator uses the standard avoirdupois ounce (28.3495 g), not the troy ounce (31.1035 g).
Frequently asked questions
How many grams is 8 ounces?
8 oz × 28.3495 = 226.8 grams — exactly half a pound. This is a common cooking measurement: 8 oz of cream cheese is one standard block (226 g), and 8 oz of pasta is a typical 2-serving portion.
How many grams is 16 ounces?
16 oz = 1 pound = 453.592 grams. A 16 oz steak is about 453 grams.
How many ounces is 200 grams?
200 g ÷ 28.3495 = 7.055 ounces, approximately 7 oz.
What is the difference between a fluid ounce and a weight ounce?
A weight ounce (avoirdupois ounce) measures mass — 28.3495 grams. A fluid ounce measures volume — 29.5735 milliliters (US) or 28.4131 ml (UK/Imperial). They are different units that happen to share the name 'ounce.' Importantly, 1 fl oz of water weighs approximately 1 weight oz (the US fluid ounce was defined as the volume of 1 ounce of water), but this only holds for water — other liquids have different densities.
How many ounces is a standard portion of protein?
US dietary guidelines and restaurant menus frequently express protein portions in ounces. Common portions: 3 oz = 85 g (a palm-sized chicken breast serving), 4 oz = 113 g (a quarter-pound burger patty raw), 6 oz = 170 g (a typical restaurant chicken breast), 8 oz = 227 g (a typical restaurant steak), 12 oz = 340 g (a large steak).