Ounces to Grams Converter
Convert ounces to grams with precise calculations. Essential for cooking, baking, shipping, and scientific measurements.
Enter ounces to calculate grams and other weight measurements
Conversion Formula
| Ounces | Grams | Pounds | Description |
|---|---|---|---|
| 1 oz | 28.35 g | 0.0625 lbs | 1 ounce |
| 2 oz | 56.70 g | 0.1250 lbs | 2 ounces |
| 4 oz | 113.40 g | 0.2500 lbs | Quarter pound |
| 8 oz | 226.80 g | 0.5000 lbs | Half pound |
| 12 oz | 340.19 g | 0.7500 lbs | Three-quarters pound |
| 16 oz | 453.59 g | 1.0000 lbs | One pound |
| 32 oz | 907.18 g | 2.0000 lbs | Two pounds |
| 64 oz | 1814.37 g | 4.0000 lbs | Four pounds |
How It Works
Converting ounces to grams uses a precise multiplication formula:
The conversion factor 28.3495 comes from the international definition of the ounce. One ounce (avoirdupois) equals exactly 28.349523125 grams, commonly rounded to 28.3495 for practical calculations.
Why 28.3495 grams per ounce?
The ounce is defined as 1/16 of a pound, and the international pound is defined as exactly 453.59237 grams. Therefore: 453.59237 ÷ 16 = 28.349523125 grams per ounce.
Examples
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Ounces vs Grams Comparison
Applications
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What is Ounces to Grams Conversion?
Ounces to grams conversion is the process of converting weight measurements from the imperial system (ounces) to the metric system (grams). This conversion is essential for international cooking, shipping, scientific work, and commerce where different measurement systems are used.
The conversion factor is based on the international definition where 1 ounce (avoirdupois) equals exactly 28.349523125 grams, commonly rounded to 28.3495 for practical calculations.
Formula
How It Works
The conversion uses the exact relationship: Grams = Ounces × 28.3495
This factor comes from the definition of the international pound as exactly 453.59237 grams, and since there are 16 ounces in a pound: 453.59237 ÷ 16 = 28.349523125 grams per ounce.
The ounce is part of the imperial system while the gram is part of the metric system, making this conversion essential for international communication and trade.
History and Background
The ounce has ancient origins, derived from the Roman "uncia" meaning one-twelfth. The modern avoirdupois ounce was standardized in 1959 as part of international agreements. The gram was introduced during the French Revolution as part of the metric system, originally defined as the mass of one cubic centimeter of water at its freezing point.
Practical Applications
This conversion is essential for international cooking, postal services, scientific research, pharmaceutical dosing, and precious metal trading. It enables accurate communication of weights across different measurement systems and ensures precision in critical applications.
Best Practices
Use the exact conversion factor (28.3495) for precision work. Remember that ounces measure weight while fluid ounces measure volume - don't confuse them. For cooking, consider that ingredient density affects volume-to-weight conversions. Always specify which type of ounce you're using in professional contexts.