Weight conversion
Convert Ounces to Grams
1 ounce equals 28.35 grams. To convert ounces to grams, multiply the number of ounces by 28.3495.
Ounces to grams is the baker's and cook's conversion — recipes, nutrition labels, coffee doses, and postage all bounce between the two. This page handles weight (avoirdupois) ounces, not fluid ounces. Enter any ounce value and the grams appear instantly, with the exact factor shown.
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Computed at full precision in your browser; the result is rounded for display.
How to convert ounces to grams
Formula
grams = ounces × 28.3495 ounces = grams ÷ 28.3495One avoirdupois ounce is exactly 28.349523125 grams (it's 1/16 of a pound, and a pound is 453.59237 g). The displayed 28.35 is that figure rounded.
| Ounces | Grams |
|---|---|
| 0.5 oz | 14.17 g |
| 1 oz | 28.35 g |
| 2 oz | 56.7 g |
| 3 oz | 85.05 g |
| 4 oz | 113.40 g ¼ pound |
| 8 oz | 226.80 g ½ pound |
| 12 oz | 340.19 g |
| 16 oz | 453.59 g 1 pound |
| 24 oz | 680.39 g |
| 32 oz | 907.18 g 2 pounds |
Worked example
A US recipe calls for 4 ounces of chocolate but your kitchen scale is metric. Multiply 4 × 28.3495 to get about 113 grams. For coffee, an 8-ounce bag is 227 grams, and a 16-ounce (one-pound) bag is 454 grams — the same number as grams in a pound.
Shortcut. Quick estimate: multiply ounces by 28, or by 30 if you only need a ballpark. 4 oz → about 112–120 g, bracketing the true 113 g.
Good to know
Be sure you're converting weight ounces, not fluid ounces — they share a name but measure different things (mass vs volume), and 1 fluid ounce of water happens to weigh about 1.04 ounces, which is why people confuse them. For baking accuracy, weighing in grams beats measuring by volume, since a cup of flour can vary by 20% depending on how it's packed.
Frequently asked questions
How many grams is 1 oz?
One ounce (weight) is 28.35 grams. Multiply any ounce figure by 28.3495 to get grams.
What is 8 oz in grams?
8 ounces equals about 227 grams (half a pound). 4 oz is 113 g and 16 oz is 454 g.
Is this fluid ounces or weight ounces?
Weight (avoirdupois) ounces. Fluid ounces measure volume, not mass, and need a different conversion that depends on the liquid's density.
How many ounces are in 100 grams?
100 grams is about 3.53 ounces (divide by 28.3495). 250 g is roughly 8.8 oz.
Why weigh ingredients in grams?
Grams are more precise than volume cups, especially for flour and sugar that pack differently. Many serious baking recipes list grams for exactly this reason.