Convert between ounces and grams instantly. Includes step-by-step working, decimal precision controls, and a common weight reference table for cooking, baking, and everyday use.
Below is a handy reference table for the most common ounce-to-gram conversions used in cooking, baking, and everyday weight measurements.
| Ounces (oz) | Grams (g) | Pounds (lb) | Common Use |
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This weight converter uses the standard conversion factor between ounces and grams. One avoirdupois ounce equals exactly 28.3495 grams. Conversely, one gram equals approximately 0.035274 ounces. These conversion factors are internationally recognized and used in cooking, baking, shipping, and scientific applications worldwide.
Our converter also shows you the equivalent weight in pounds (1 lb = 16 oz) and kilograms (1 kg = 1000 g). This gives you a complete picture of the weight across the most commonly used units in both the imperial and metric systems.
Ounce-to-gram conversion is essential in many real-world situations. In cooking and baking, many international recipes use grams while American recipes use ounces. In shipping and postage, package weights are often measured in both units. Nutritional information on food labels frequently lists serving sizes in grams while using ounces on the front of packages. Scientific and laboratory work typically uses the metric system, making conversion from imperial measurements necessary when working with international data.
Ounces (oz) are a unit of weight in the imperial system, commonly used in the United States and a few other countries. One avoirdupois ounce equals 1/16 of a pound or approximately 28.35 grams. Ounces are widely used in cooking recipes, food packaging, postal services, and for measuring the weight of precious metals (troy ounces differ slightly).
Grams (g) are the standard unit of mass in the metric system, used by most countries worldwide. One gram is equal to 1/1000 of a kilogram. Grams are the go-to unit for cooking, nutrition labels, scientific measurements, and everyday weight measurements across most of the world.
For a rough mental conversion, you can use these approximate rules:
• To convert ounces to grams, multiply by 28 (close enough for everyday use). For example, 8 oz × 28 ≈ 224 g (exact: 226.8 g).
• To convert grams to ounces, divide by 28. For example, 100 g ÷ 28 ≈ 3.57 oz (exact: 3.53 oz).
• For a more precise mental estimate, remember that 1 oz ≈ 28.35 g and 1 lb ≈ 454 g.
These rough estimates are close enough for most everyday situations, but our calculator gives you the precise value using the exact conversion factor with your choice of decimal precision.