Convert ounces to grams instantly. Enter a value below, or use the formula and reference table further down the page.
In practice
Ounces-to-grams is the conversion American recipes, postal rates and product packaging force on the rest of the world. One avoirdupois ounce is exactly 28.349523125 g, though many cooks round to 28 g or even 30 g; over a single ounce that barely matters, but over 16 oz (a pound) rounding to 28 g leaves you about 6 g short. Be careful with the word 'ounce': it can also mean a fluid ounce (a volume, about 29.57 ml in the US) or a troy ounce (31.1035 g, used for precious metals), and this conversion is only for ordinary weight.
How to convert ounces to grams
Multiply the value by 28.34952313.
g = oz × 28.34952313Example: 10 oz = 283.4952 g.
Ounces to Grams conversion table
| Ounces (oz) | Grams (g) |
|---|---|
| 1 oz | 28.3495 g |
| 2 oz | 56.699 g |
| 3 oz | 85.0486 g |
| 4 oz | 113.3981 g |
| 5 oz | 141.7476 g |
| 10 oz | 283.4952 g |
| 15 oz | 425.2428 g |
| 20 oz | 566.9905 g |
| 25 oz | 708.7381 g |
| 50 oz | 1417.4762 g |
| 100 oz | 2834.9523 g |
Frequently asked questions
How many grams is 1 ounce?
1 ounce equals 28.3495 grams.
What is the formula to convert oz to g?
To convert oz to g, multiply the value by 28.34952313. The full formula is: g = oz × 28.34952313.
How do I convert grams back to ounces?
Use the same calculator above and type your value into the grams field instead — it converts in both directions. Or use the reverse formula: oz = g ÷ 28.34952313.
Is the oz to g conversion exact?
The conversion factor used here (28.34952313) is the standard internationally defined value. Results on this page are rounded to four decimal places for readability.