How to Convert Ounces to Grams
Simple Formula with Practical Examples
Convert NowWhether you're following an international recipe, weighing ingredients for baking, or shipping a small package, converting between ounces and grams is a common need. This guide shows you exactly how to make the conversion with the formula, worked examples, and a handy reference table.
Understanding the Conversion
One avoirdupois ounce (the standard ounce used in the US and UK for most purposes) equals exactly:
1 oz = 28.349523125 grams
For most practical purposes, using 28.35 grams per ounce is accurate enough. For rough estimates, just multiply by 28.
Note: This is the avoirdupois ounce, not the troy ounce used for precious metals (which equals 31.1 grams).
Step-by-Step Examples
Example 1: Converting 4 oz to Grams
A recipe calls for 4 ounces of chocolate.
Step 1: Multiply by 28.35
4 × 28.35 = 113.4 grams
Example 2: Converting 8 oz to Grams
You need to weigh 8 ounces of flour.
Step 1: 8 × 28.35 = 226.8 grams
Example 3: Converting 1.5 oz to Grams
A small package weighs 1.5 ounces.
Step 1: 1.5 × 28.35 = 42.5 grams
Example 4: Converting 16 oz (1 pound) to Grams
Step 1: 16 × 28.35 = 453.6 grams
This confirms that 1 pound ≈ 454 grams.
Quick Reference Table
| Ounces (oz) | Grams (g) | Common Use |
|---|---|---|
| 0.5 oz | 14 g | Small spice quantity |
| 1 oz | 28 g | Cheese slice, small portion |
| 2 oz | 57 g | Pasta serving |
| 3 oz | 85 g | Meat serving |
| 4 oz | 113 g | Stick of butter (US) |
| 5 oz | 142 g | Small yogurt |
| 6 oz | 170 g | Small can of tuna |
| 8 oz | 227 g | Cup of flour, cream cheese block |
| 10 oz | 283 g | Frozen vegetable bag |
| 12 oz | 340 g | Soda can |
| 16 oz (1 lb) | 454 g | Pound of meat |
Converting Grams Back to Ounces
Need to go the other direction? Divide grams by 28.35:
Ounces = Grams ÷ 28.35
Example: 100 grams to ounces
100 ÷ 28.35 = 3.53 oz
Common Applications
Cooking and Baking
Precise measurements matter in baking. A kitchen scale that shows both ounces and grams is invaluable when following recipes from different countries.
Postal and Shipping
USPS first-class mail rates change at 1-ounce increments. Knowing that 28 grams ≈ 1 ounce helps estimate postage costs.
Food Nutrition Labels
US nutrition labels show serving sizes in both grams and ounces. Understanding the relationship helps with portion control.
Conclusion
Converting ounces to grams is simple: multiply by 28.35 (or 28 for quick estimates). This conversion is essential for cooking, shipping, and understanding measurements across different systems.
For instant, accurate conversions, use our free weight converter.