Ounce to Gram Converter
Our free volume & weight converter handles ounce gram conversions. See tables, ratios, and examples for quick reference.
Formula
Grams = Ounces x 28.3495 (avoirdupois) or x 31.1035 (troy)
Multiply ounces by 28.3495 for standard avoirdupois ounces, or by 31.1035 for troy ounces used with precious metals. Divide grams by the same factor for the reverse conversion.
Worked Examples
Example 1: Cooking Ingredient Conversion
Problem: A recipe calls for 6 ounces of chocolate. How many grams is that?
Solution: Grams = 6 oz x 28.3495 g/oz = 170.097 grams\nKilograms = 170.097 / 1000 = 0.170 kg\nPounds = 6 / 16 = 0.375 lb
Result: 6 oz = 170.097 grams
Example 2: Gold Weight Conversion
Problem: A gold bar weighs 100 grams. How many troy ounces is that?
Solution: Troy ounces = 100 g / 31.1035 g/troy oz = 3.2151 troy oz\nAvoirdupois ounces = 100 / 28.3495 = 3.5274 oz\nCarats = 100 x 5 = 500 carats
Result: 100 grams = 3.2151 troy ounces
Frequently Asked Questions
How many grams are in an ounce?
One avoirdupois ounce (the standard ounce used for food and everyday items) equals 28.3495 grams. One troy ounce (used for precious metals like gold and silver) equals 31.1035 grams. The avoirdupois ounce is by far the more common measurement and is what people typically mean when they say ounce. The difference between the two is about 10%, which is significant when buying or selling precious metals.
Can I use Ounce to Gram Converter on a mobile device?
Yes. All calculators on NovaCalculator are fully responsive and work on smartphones, tablets, and desktops. The layout adapts automatically to your screen size.
Can I share or bookmark my calculation?
You can bookmark the calculator page in your browser. Many calculators also display a shareable result summary you can copy. The page URL stays the same so returning to it will bring you back to the same tool.
How accurate are the results from Ounce to Gram Converter?
All calculations use established mathematical formulas and are performed with high-precision arithmetic. Results are accurate to the precision shown. For critical decisions in finance, medicine, or engineering, always verify results with a qualified professional.
How do I get the most accurate result?
Enter values as precisely as possible using the correct units for each field. Check that you have selected the right unit (e.g. kilograms vs pounds, meters vs feet) before calculating. Rounding inputs early can reduce output precision.
How do I interpret the result?
Results are displayed with a label and unit to help you understand the output. Many calculators include a short explanation or classification below the result (for example, a BMI category or risk level). Refer to the worked examples section on this page for real-world context.