Ounce to Gram Converter
Convert ounces to grams with precision. This calculator handles both weight ounces (oz) and fluid ounces (fl oz). Weight ounces measure mass, while fluid ounces measure volume - they are different units that happen to share similar names.
Enter weight in ounces (oz)
Weight oz and fluid oz are different measurements
How many grams are in an ounce?
1 ounce (weight) = 28.3495 grams. This is for weight ounces (oz), not fluid ounces. For example, 8 oz = 226.8 grams, 16 oz (1 pound) = 453.6 grams. This conversion is exact and standardized internationally.
What's the difference between ounces and fluid ounces?
Ounces (oz) measure weight/mass, while fluid ounces (fl oz) measure volume. 1 oz = 28.35g of weight. 1 fl oz = 29.57 mL of volume. For water, 1 fl oz weighs about 1 oz, but for other substances (like honey or oil), the weight differs from the volume. Always check which type you're measuring!
How do I convert ounces to grams for cooking?
Multiply ounces by 28.35 to get grams. For example: 4 oz butter = 113.4g, 8 oz flour = 226.8g, 12 oz chocolate = 340.2g. For baking precision, use a kitchen scale. Weight measurements are more accurate than volume for consistent results.
How many grams is 8 oz?
8 ounces = 226.8 grams (weight). This is half a pound. In cooking, 8 oz is common for measuring ingredients like cheese (1 cup shredded ≈ 8 oz = 227g), butter (1 cup = 8 oz = 227g), or chocolate chips (about 1⅓ cups).
How many grams is 16 oz?
16 ounces = 453.592 grams, which equals exactly 1 pound (lb). This is a common package size for many grocery items. For quick reference: 16 oz = 1 lb = 454g (rounded). Half pound = 8 oz = 227g. Quarter pound = 4 oz = 113g.
Why do recipes use ounces instead of grams?
American recipes traditionally use ounces and pounds (imperial system), while most of the world uses grams and kilograms (metric system). Ounces are standard in the US, but grams are more precise and easier for scaling recipes. Converting US recipes to metric makes them more accurate and internationally accessible.
How do I convert fluid ounces to grams?
For water: 1 fl oz ≈ 29.57 grams. For other liquids, it varies by density. Milk: 1 fl oz ≈ 30.5g. Oil: 1 fl oz ≈ 27.5g. Honey: 1 fl oz ≈ 42.5g. Fluid ounces measure volume, so the gram weight changes based on what you're measuring. Use the "Fluid Ounces" option in this calculator for water-based conversions.