Convert Ounces to Grams Instantly
Type in any weight in ounces (oz) and get the exact number of grams (g) right away — no math, no guessing. 1 ounce equals 28.3495 grams, so the converter does that multiplication for you.
How to Use the Ounces to Grams Calculator
- Enter your weight in the ounces field above.
- The grams result appears instantly — no button to press.
- Need to go the other way? Switch the direction to convert grams to ounces in one click.
Everything runs in your browser. Nothing is sent to a server, so your numbers stay private.
Worked Example: 8 Ounces to Grams
Say a recipe calls for 8 oz of flour but your kitchen scale only shows grams.
- Enter 8 in the ounces box.
- The converter multiplies: 8 × 28.3495 = 226.796 g.
- Round to 227 g for practical cooking — that's all there is to it.
How the Conversion Is Calculated
The formula is straightforward:
grams = ounces × 28.3495That factor — 28.3495 — is the internationally agreed definition of one avoirdupois ounce (the everyday ounce used in the US and UK for food, postal weights, and retail goods). The troy ounce used for precious metals is different (31.1035 g), but this tool uses the standard avoirdupois value.
Common Ounces to Grams Reference Table
| Ounces (oz) | Grams (g) |
|---|---|
| 1 oz | 28.35 g |
| 2 oz | 56.70 g |
| 5 oz | 141.75 g |
| 10 oz | 283.50 g |
| 25 oz | 708.74 g |
| 50 oz | 1,417.48 g |
| 100 oz | 2,834.95 g |
Reverse conversion: grams ÷ 28.3495 = ounces.
Other Ways People Search for This
People phrase this question in lots of different ways — they all lead to the same calculation:
- "oz to g" — the short form, same conversion.
- "how many grams in an ounce" — answer: 28.35 g.
- "fluid ounces to grams" — be careful here. Fluid ounces measure volume, not weight. For water, 1 fl oz ≈ 29.57 g, but for other liquids (milk, oil, honey) the number changes with density. This tool converts weight ounces only.
- "ounces to milligrams" — multiply grams by 1,000. 1 oz = 28,349.5 mg.
- "grams to ounces" — just flip the direction in the converter above.
Quick Tips and Common Mistakes
- Don't confuse weight ounces with fluid ounces. A fluid ounce is a unit of volume (like a teaspoon or cup). If your recipe says "4 fl oz of milk," that's about 118 ml — not 113 g.
- Rounding for cooking: most recipes round to the nearest gram. For baking, try to stay within 1–2 g of the target for best results.
- US vs UK labelling: US food packaging usually shows ounces; European and UK packaging usually shows grams. This converter bridges the two instantly.
- Half an ounce: 0.5 oz = 14.17 g — handy for spice measurements.
- Postal weights: couriers like USPS and FedEx sometimes list package limits in both oz and g. Use the table above to cross-check quickly.
Everything is computed locally in your browser — no data is uploaded anywhere. Bookmark this page for quick access next time a recipe or label trips you up.