Ounces to Grams Converter
Convert ounces to grams instantly for cooking recipes, postal weights, and ingredient measurements.
Last updated: May 2026
Enter a value to see the conversion instantly.
How to convert ounces to grams
Enter a value in the ounces field to instantly see the equivalent in grams. The formula is: grams = ounces × 28.3495. The reverse: ounces = grams ÷ 28.3495.
Ingredient weight reference: ounces and grams
| Ounces | Grams | Context |
|---|---|---|
| 0.5 oz | 14.2 g | Half an ounce of spice |
| 1 oz | 28.35 g | Standard dry ingredient measure |
| 2 oz | 56.7 g | Small chocolate bar |
| 3.5 oz | 99.2 g | Common deli portion |
| 4 oz | 113.4 g | Quarter-pound |
| 8 oz | 226.8 g | Half-pound |
| 16 oz | 453.6 g | One pound |
When is this useful?
Cooking and baking: US recipes often list dry ingredients in ounces, while metric recipes use grams. Converting between the two lets you follow any recipe accurately without re-measuring.
Jewelry and precious metals: Gold, silver, and gemstone weights are quoted in troy ounces or avoirdupois ounces depending on the context. Knowing the gram equivalent helps when comparing prices or reading product specifications.
Postal and shipping limits: Many couriers set parcel weight limits in grams or kilograms. If your package weight is listed in ounces, converting to grams helps you verify compliance before dispatch.
Sports nutrition and supplements: Protein powder scoops, pre-workout servings, and supplement labels often show both oz and g. Using this converter lets you cross-reference serving sizes when products switch between unit systems.
Frequently Asked Questions
How many grams are in an ounce?
Exactly 28.349523125 grams. In everyday use this is rounded to 28.35 g. The figure is fixed under the international avoirdupois standard and applies to all common weight ounces used in cooking, shipping, and retail.
What is 4 oz in grams?
4 oz equals 113.4 g (4 × 28.35). This weight is also known as a quarter-pound and appears frequently in cooking, particularly for portioning meat and produce.
Do ounces mean the same thing for liquids and solids?
No. Fluid ounces (fl oz) measure volume, not weight. This converter works with weight ounces only (avoirdupois oz). One fluid ounce of water happens to weigh approximately 29.57 g, but the value changes for other liquids. If your recipe specifies fl oz, use a volume converter instead.
Why do US recipes use ounces while European recipes use grams?
The United States retained the imperial measurement system when most other countries adopted the metric system in the 20th century. US cookbooks and packaged food labels are written in cups, tablespoons, and ounces, while European recipes default to grams and millilitres. Neither system is more accurate for cooking; grams are simply easier to scale precisely on a kitchen scale.
How do I convert oz to g without a calculator?
Multiply by 30 for a quick mental estimate. The actual factor is 28.35, so the 30-times shortcut overshoots by about 6%, which is close enough for casual use. For precise baking, use this converter or multiply by 28.35.