Ounces to Grams Converter
Convert ounces to grams instantly and back again. Uses the exact 28.3495 g per ounce factor, with worked examples, a kitchen-friendly chart and common cooking conversions.
Updated 2026-06-14 · Free · No sign-up · Runs privately in your browser
Show the formula & steps
How the Ounces to Grams Converter Works
This converter turns ounces into grams and back, using the exact international factor of 28.349523125 grams per ounce. Enter a value, pick the direction, and the result updates live with the steps shown.
The Formula
Grams = ounces × 28.349523125
The ounce here is the avoirdupois ounce used for food and everyday weights — not the troy ounce used for gold and silver. To reverse the conversion, divide grams by 28.349523125.
Worked Example
Convert 8 ounces to grams:
- 8 × 28.349523125 = 226.8 grams
Convert 250 grams to ounces:
- 250 ÷ 28.349523125 = 8.82 ounces
Kitchen Reference Chart
| Ounces | Grams |
|---|---|
| 1 | 28.35 |
| 2 | 56.70 |
| 4 | 113.40 |
| 8 | 226.80 |
| 16 (1 lb) | 453.59 |
Avoirdupois vs Troy Ounces
Most conversions use the avoirdupois ounce (28.35 g), the standard for groceries, recipes and postage. Precious metals use the troy ounce, which is heavier at 31.1035 g. If you are weighing gold, silver or platinum, use a dedicated troy-ounce conversion instead of this one.
Frequently asked questions
How many grams are in an ounce?+
One avoirdupois ounce equals exactly 28.349523125 grams, usually rounded to 28.35 g. This is the ounce used for food, postage and general weight in the US and UK.
How do I convert ounces to grams?+
Multiply the number of ounces by 28.349523125. For example, 8 ounces × 28.349523125 = 226.8 grams. To go from grams to ounces, divide by the same factor.
How many grams is 4 oz?+
4 ounces equals about 113.4 grams. Multiply 4 by 28.349523125 to get the precise figure of 113.398 grams, often rounded to 113 g in recipes.
Is a troy ounce the same as a regular ounce?+
No. A troy ounce, used for precious metals, equals 31.1035 grams, while the standard avoirdupois ounce equals 28.35 grams. This converter uses the standard avoirdupois ounce.
How many grams in 16 ounces?+
16 ounces (one pound) equals about 453.6 grams. That is why one pound is often quoted as 454 g in cooking and shipping.