Ounces-to-Grams Converter
Fast, accurate and free online uncje gramy converter tool running directly in your browser.
-
1Enter data
Enter content, paste text or load a file from disk. -
2Click the button
The tool will immediately process your data in the browser. -
3Get the result
Copy the finished text or save the file to your device.
return "Result ready in 0.1s";
}
Rate this tool:
Related tools
Other tools you may find usefulOunces to grams converter - avoirdupois and troy oz to metric
An ounce (oz) is a unit of mass in the imperial system. There are several types: avoirdupois ounce (food products, body weight) and troy ounce (precious metals - gold, silver). The tool converts all types of ounces into grams, kilograms and pounds.
Ounce types – avoirdupois vs troy
Avoirdupois ounce (oz av): 28.3495 g. Commonly used in USA/UK: Food, Beverage, Parcels. 16 oz av = 1 pound (lb). Troy ounce (oz t): 31.1035 g. Used for precious metals (gold, silver, platinum). 12 troy oz = 1 troy pound. 1 troy oz = 1.0971 oz av. Medical ounce (apothecary oz): 31.1035 g (= troy, historical).
Ounce Conversions
1 oz (av) = 28.3495 g = 0.028349 kg. 1 lb = 16 oz = 453.59 g = 0.45359 kg. 1 troy oz = 31.1035 g. 1 troy lb = 12 troy oz = 373.24 g. For comparison: 100 g = 3.527 oz av. 500 g = 17.64 oz. 1 kg = 35.27 oz.
Precious metals – troy oz
Gold (XAU): price per troy ounce. E.g. $2000/troy oz = $64.29/hour. Silver (XAG): similar. 1 troy oz of gold = 31.1g ≈ the size of a sugar cube. 1 kg gold bar = 32.15 troy oz. For investment: always check whether the price is for troy oz or oz av.
Food and Beverage - oz avoirdupois
US Beverage Can: 12 fl oz = 355 ml. UK can: 11.16 oz av = 330 ml. Water bottle 500ml ≈ 17.6 oz. Steak 300g ≈ 10.6 oz. Hamburger 1/4 lb = 4 oz = 113g. US regulations: 1 cup = 8 fl oz = 236.6 ml (fl oz = fluid oz, not bulk!).
FAQ
What is the difference between fluid ounce and weight ounce?
Fluid ounce (fl oz) = a measure of volume: US fl oz = 29.57 ml, UK fl oz = 28.41 ml. Ounce by weight (oz av) = measure of mass: 28.35 g. For water: 1 fl oz ≈ 1 oz by weight (density of water ≈ 1 g/ml). For other liquids: the difference!
How much gold is in 1 troy oz?
1 troy oz of gold = 31.1035 g of pure gold (Au 999.9). Gold jewelry: 14K (14/24 = 58.3% gold) = 18.1 g gold/troy oz. 18K (75%) = 23.33 g. 24K = 100% = 31.1 g. In a 1 troy oz bar (Bullion): 31.1 g of pure gold.
How do I convert kcal to ounces of food?
Kcal is energy, not mass - it cannot be converted directly. But: US labels list nutritional values per 1 oz or "serving size" per oz. E.g. 1 oz of nuts (28.35 g) = ~165 kcal. Peanuts: 1 oz ≈ 160 kcal (for 570 kcal/100g).
Why is gold measured in troy oz and not grams?
Troy oz comes from the city of Troyes (France), the center of metals trading in the 12th-13th centuries. The troy system has been used by the London Metal Exchanges (LBMA) since the 17th century. Today it is the global standard for precious metals trading. Changing to grams would require rewriting all futures contracts.
How to quickly convert oz to grams in your head?
Mnemonic: 1 oz ≈ 28 g (rounded). More precisely: 1 oz × 28.35 = grams. For 4 oz: 4×28=112 g (113.4 to be exact). For 16 oz (1 lb): 453 g ≈ half a kilogram minus a little.
Related tools: stone to kilogram converter, kitchen measurement converter and inches to cm converter.