Ounces to Grams Converter
Convert ounces to grams instantly. Free oz to g converter with formula, reference table, and no signup required.
What Is a Ounces to Grams Converter?
The ounce-to-gram conversion is indispensable in cooking and baking, nutritional tracking, shipping and postage calculations, and precious metals trading. Bakers converting between American recipes (ounces and cups) and international recipes (grams) use this conversion for every ingredient. Nutritional labels in the US display serving sizes in both grams and ounces, while international labels use grams exclusively.
The Conversion Formula
The formula to convert ounces to grams is:
Grams = Ounces × 28.3495
The reverse formula is: Ounces = Grams ÷ 28.3495
Ounces to Grams Reference Table
| Ounces (oz) | Grams (g) |
|---|---|
| 0.25 oz | 7.09 g |
| 0.5 oz | 14.17 g |
| 1 oz | 28.35 g |
| 2 oz | 56.70 g |
| 3 oz | 85.05 g |
| 4 oz | 113.40 g |
| 5 oz | 141.75 g |
| 6 oz | 170.10 g |
| 8 oz | 226.80 g |
| 10 oz | 283.50 g |
| 12 oz | 340.19 g |
| 14 oz | 396.89 g |
| 16 oz | 453.59 g |
| 20 oz | 566.99 g |
| 24 oz | 680.39 g |
| 32 oz | 907.18 g |
| 48 oz | 1360.78 g |
| 64 oz | 1814.37 g |
| 80 oz | 2267.96 g |
| 100 oz | 2834.95 g |
How to Use This Converter
- Enter your ounces value in the input field above.
- View the result — the grams equivalent appears instantly.
- For manual conversion, use the formula: Grams = Ounces × 28.3495.
- Check the reference table above for 20 pre-calculated common values.
Conversion Tips
- One ounce is approximately 28 grams. For cooking, 28g is close enough. For precision applications (jewelry, pharmaceuticals), use the exact factor of 28.3495 grams per ounce.
- Coffee brewing ratios use grams for precision. The standard ratio is 1:16 (coffee to water). For a 12 oz (340g) cup, you need 21g of coffee. Kitchen scales that show both units eliminate conversion errors.
- US nutrition labels list serving sizes in both ounces and grams. When tracking macros with international apps, use the gram values - they are more precise and universally understood.
Related Conversions
- Grams to Ounces Converter
- Kilograms to Pounds Converter
- Pounds to Kilograms Converter
- Pounds to Ounces Converter
- Ounces to Pounds Converter
All conversions are calculated client-side in your browser. No data is sent to any server. For the authoritative source on unit definitions, see the National Institute of Standards and Technology (NIST).
Frequently Asked Questions
How many grams are in an ounce?
One ounce (avoirdupois) equals approximately 28.35 grams. One troy ounce (used for precious metals) equals 31.1035 grams. Standard cooking and shipping measurements use the avoirdupois ounce.
Is a fluid ounce the same as a weight ounce?
No. A fluid ounce measures volume (29.57 mL), while a weight ounce measures mass (28.35 grams). A fluid ounce of water weighs approximately 1.04 weight ounces. This distinction matters in cooking and scientific measurements.
How many grams are in a pound?
One pound equals 453.592 grams or approximately 454 grams. Since 1 pound = 16 ounces, and each ounce is 28.35 grams, the math checks out: 16 × 28.35 = 453.6 grams.
Why do recipes sometimes call for grams instead of ounces?
Professional baking recipes use grams because measuring by weight is more accurate than measuring by volume. A cup of flour can vary by 30% depending on how it's scooped, but 120 grams of flour is always 120 grams.
Results are calculated in your browser using standard formulas and are provided for reference only. For critical or high-stakes decisions, verify results with an authoritative source.
Free Tools Alert
Join 10,000+ creators. Get our newest productivity tools, templates, and calculators directly to your inbox every month.
No spam. One-click unsubscribe.