Convert Ounces to Grams
Ounces to grams is the conversion for turning an imperial food weight into exact metric grams — the move you make when a recipe lists ounces but your scale is set to grams. One ounce is exactly 28.349523125 grams, so every ounce figure becomes a bigger number in grams.
Ounces to Grams conversion table
| Ounces (oz) | Grams (g) |
|---|---|
| 1 | 28.349523 |
| 2 | 56.699046 |
| 3 | 85.048569 |
| 5 | 141.747616 |
| 10 | 283.495231 |
| 20 | 566.990463 |
| 50 | 1,417.476156 |
| 100 | 2,834.952313 |
| 500 | 14,174.761563 |
| 1,000 | 28,349.523125 |
The formula
To convert ounces to grams, multiply the weight in ounces by 28.349523125:
grams = ounces × 28.349523125
A worked example
A recipe calls for 8 oz of butter and your scale reads grams:
8 × 28.349523125 = 226.8 g
So eight ounces is about 227 grams — half a pound, which is why butter often comes in that size block.
Why precision pays off here
The ounce carries a long exact value, 28.349523125 grams, because it's pinned to the pound, which is pinned to the gram. In baking especially, a recipe might list several ingredients in ounces, and using the full factor keeps the totals honest — rounding each one to 28 g would quietly throw the whole batch off.
When you'll use it
Baking from a recipe written in ounces on a metric scale, converting a packaged ounce weight into grams for nutrition math, scaling a recipe up or down, or matching an ounce-based portion to a grams-based guideline.
Frequently asked questions
How many grams are in an ounce?
Exactly 28.349523125 grams. The avoirdupois ounce is defined as one-sixteenth of the international pound, so multiplying by that value is precise.
Can I just use 28 grams per ounce?
For a rough estimate, yes — 28 g per ounce is close. But for baking or anything where amounts matter, use the full 28.349523125 so small errors don't stack up across several ingredients.
Is this ounce the same one used for measuring gold?
No. This is the everyday avoirdupois ounce for food and general weights. Precious metals are measured in troy ounces, which are heavier and use a different factor.