12 ounces is equal to 340.194 grams.
To convert 12 ounces to grams, you multiply the number of ounces by the conversion factor 28.3495 because one ounce equals approximately 28.3495 grams. This gives you the weight in grams.
Conversion Tool
Result in g:
Conversion Formula
The formula for converting ounce (oz) to grams (g) is based on the fixed relationship between these units: 1 ounce equals 28.3495 grams. So to convert ounces to grams, multiply the ounce value by 28.3495. This works because the ounce is a unit from the imperial system, while gram is metric.
Formula: grams = ounces × 28.3495
Example with 12 ounces:
- Start with 12 ounces.
- Multiply by 28.3495: 12 × 28.3495 = 340.194 grams.
- Result: 12 oz = 340.194 g.
Conversion Example
- Convert 5 ounces to grams:
- Multiply 5 by 28.3495.
- 5 × 28.3495 = 141.7475 grams.
- So, 5 oz equals 141.7475 g.
- Convert 20 ounces to grams:
- 20 × 28.3495 = 566.99 grams.
- Therefore 20 oz equals 566.99 g.
- Convert 0.5 ounces to grams:
- 0.5 × 28.3495 = 14.17475 grams.
- Hence, 0.5 oz equals 14.17475 g.
- Convert 15.7 ounces to grams:
- 15.7 × 28.3495 = 445.03415 grams.
- So 15.7 oz equals 445.03415 g.
Conversion Chart
This chart shows ounces from -13.0 to 37.0 converted to grams. Find your ounce value in the left column, then read across to find the equivalent grams on the right. Negative values can represent weight differences or measurements below zero in calculations.
| Ounces (oz) | Grams (g) |
|---|---|
| -13.0 | -368.5435 |
| -10.0 | -283.4950 |
| -7.0 | -198.4465 |
| -4.0 | -113.3980 |
| -1.0 | -28.3495 |
| 0.0 | 0.0000 |
| 3.0 | 85.0485 |
| 6.0 | 170.0970 |
| 9.0 | 255.1455 |
| 12.0 | 340.1940 |
| 15.0 | 425.2425 |
| 18.0 | 510.2910 |
| 21.0 | 595.3395 |
| 24.0 | 680.3880 |
| 27.0 | 765.4365 |
| 30.0 | 850.4850 |
| 33.0 | 935.5335 |
| 37.0 | 1048.9315 |
Related Conversion Questions
- How many grams are in 12 ounces exactly?
- What is 12 oz converted to grams using a calculator?
- Is 12 ounces heavier than 300 grams?
- How do I convert 12 ounces to grams manually?
- What is the gram equivalent of 12 ounces in cooking?
- Can you convert 12 oz to grams for me?
- Does 12 ounces equal more or less than 350 grams?
Conversion Definitions
Ounce: An ounce (abbreviated as oz) is a unit of weight used primarily in the United States, United Kingdom, and other countries using the imperial system. One ounce equals 1/16th of a pound or exactly 28.3495 grams in the metric system. It is often used for measuring small quantities of ingredients or objects.
Gram: A gram (abbreviated as g) is the metric unit of mass, part of the International System of Units. Defined as one-thousandth of a kilogram, it is widely used worldwide for measuring weight in science, cooking, and commerce. One gram equals approximately 0.03527 ounces.
Conversion FAQs
Does temperature affect ounce to gram conversion?
The conversion between ounces and grams does not depend on temperature because both are units of mass, which remain constant regardless of temperature changes. However, if measuring volume or density, temperature might affect those measurements but not this direct mass conversion.
Why is the conversion factor 28.3495 and not a whole number?
The ounce was standardized to be exactly 28.3495 grams based on historical definitions and agreements between measurement systems. Since the imperial and metric systems developed independently, their conversions result in decimal values, not whole numbers.
Can I convert fluid ounces to grams using the same formula?
No, fluid ounces measure volume, not mass. The conversion to grams depends on the density of the liquid or substance. So 12 fluid ounces of water might weigh differently than 12 ounces of a solid ingredient. Use density values to convert fluid ounces to grams.
Is rounding off the result acceptable in cooking?
Yes, rounding grams to the nearest whole number or one decimal place is generally acceptable for cooking. Small deviations rarely affect the recipe’s outcome significantly. However, for scientific uses, more precise values may be necessary.
How to convert ounces to grams without a calculator?
You can estimate by multiplying ounces by 28 to get close, then add a bit more for the 0.3495 part. For example, 12 × 28 = 336, then add around 4.2 (12 × 0.3495) to reach 340.2 grams. This method gives a rough but practical estimate.