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Ounces to Grams Converter

Convert ounces to grams accurately. Essential for cooking and nutrition.

Common Conversions

1 Kilogram = 2.20462 Pounds
1 Pound = 16 Ounces
1 Stone = 14 Pounds
1 Ounce = 28.3495 Grams

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What is Ounces to Grams Converter?

The ounces to grams converter is a cooking and measurement tool that multiplies ounce values by 28.3495 to produce the equivalent in grams. This conversion bridges US imperial measurements and the metric system, and is essential for following American recipes on metric kitchen scales, interpreting US food packaging outside North America, and nutritional tracking in countries that use gram-based databases.

The avoirdupois ounce is defined as one sixteenth of a pound, which equals exactly 28.349523125 grams. It is used for food, postal weights, and general commercial purposes. The troy ounce (31.1035 g), used only for precious metals, should not be confused with the standard ounce. In the kitchen, the ounce is a common unit in the US and, to a decreasing extent, the UK, while most of the world uses grams for food measurement.

How to Use This Calculator

Enter the weight in ounces and the converter instantly displays the equivalent in grams. The formula is: grams = ounces × 28.3495. For example, 4 oz = 113.4 g, 8 oz = 226.8 g, 16 oz = 453.6 g. The converter handles decimal inputs like 2.5 oz = 70.9 g. For cooking, results are typically rounded to the nearest gram.

Worked Examples

Converting an American Baking Recipe

An American cookie recipe calls for 8 oz flour, 6 oz sugar, 4 oz butter, and 2 oz chocolate chips. Converting: 8 × 28.35 = 227 g flour; 6 × 28.35 = 170 g sugar; 4 × 28.35 = 113 g butter; 2 × 28.35 = 57 g chocolate chips. These gram values allow precise weighing on a metric kitchen scale for consistent results.

Comparing US Protein Supplements

A US protein powder lists a serving as 1.2 oz (34 g) containing 25 g of protein. A European competitor lists a 35 g serving with 26 g protein. Converting the US serving: 1.2 × 28.3495 = 34.0 g, confirming the label. Per 100 g: US product has 73.5 g protein (25/34 × 100), European has 74.3 g protein. The products are nearly identical in protein density despite different serving sizes.

Ounces to Grams Reference Table (1-32 oz)

OuncesGramsCommon Reference
1 oz28.35 g1 ounce
2 oz56.70 g-
3 oz85.05 g-
4 oz113.40 g1/4 pound
5 oz141.75 g-
6 oz170.10 g-
7 oz198.45 g-
8 oz226.80 g1/2 pound
9 oz255.15 g-
10 oz283.50 g-
11 oz311.84 g-
12 oz340.19 g3/4 pound
13 oz368.54 g-
14 oz396.89 g-
15 oz425.24 g-
16 oz453.59 g1 pound
20 oz566.99 g-
24 oz680.39 g1.5 pounds
32 oz907.18 g2 pounds

Benefits of Using This Calculator

  • Convert American recipe ingredients from ounces to grams for metric kitchen scales
  • Understand US food packaging weights in metric grams
  • Calculate precise gram measurements from ounce-based nutritional data
  • Compare US and international product portion sizes using consistent gram units
  • Essential for bakers adapting American cookbooks to metric measurement systems
  • Convert postal weights between ounces (US) and grams (international)

Practical Tips

  • For quick estimates, multiply ounces by 28 (instead of 28.35). The error is less than 1.2%.
  • Remember key anchors: 4 oz = 113 g (1/4 lb), 8 oz = 227 g (1/2 lb), 16 oz = 454 g (1 lb).
  • Precious metals use troy ounces (31.1 g), not standard ounces (28.35 g) - always confirm which is meant.
  • A US fluid ounce ≈ 30 ml of water ≈ 30 g - useful for liquid conversions in cooking.

Key Takeaways

  • 11 ounce equals 28.3495 grams - multiply oz by 28.35 to convert.
  • 28 oz = 226.8 g and 16 oz = 453.6 g are the two most important cooking reference points.
  • 3The troy ounce (31.1 g) used for precious metals is different from the standard avoirdupois ounce (28.35 g).
  • 4For cooking, rounding 1 oz to 28 g gives results accurate enough for all practical purposes.

Frequently Asked Questions

One avoirdupois ounce equals exactly 28.3495 grams (more precisely, 28.349523125 grams). To convert ounces to grams, multiply by 28.3495. For cooking purposes, rounding to 28 or 28.35 grams per ounce is sufficiently accurate. Note that the troy ounce used for precious metals equals 31.1035 grams, about 10% more than the standard ounce. Always check which ounce is being referenced when dealing with precious metals.

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