ounces to grams Converter
Type a value in ounces and get the answer in grams instantly — or convert the other way. The conversion uses the exact relationship 1 ounces = 28.3495 grams, the same formula used in textbooks and engineering references.
Ounces are the US unit for food portions, ingredients and precious metals (technically troy ounces for metals); grams are the metric standard used on nutrition labels worldwide. One avoirdupois ounce is exactly 28.349523125 grams.
How to use
- Type your value into the ounces box — the grams result updates as you type.
- To go the other direction, type into the grams box instead and read the ounces result.
- Copy the result with one tap, or scan the reference table below for common values.
Frequently asked questions
How do you convert ounces to grams?
Multiply the number of ounces by 28.3495. For example, 10 ounces = 283.495 grams. The converter above does this for you and shows more decimal places than you will ever need.
How many grams are in one ounces?
Exactly 28.3495 grams. This is a fixed definition, not an approximation, so the conversion is exact at any scale.
Is this converter accurate for professional use?
Yes — it uses full double-precision arithmetic and the official ounces-to-grams factor, so results are reliable for schoolwork, cooking, fitness, travel and technical work.
Can I convert grams back to ounces?
Yes. The converter is two-way: just type in the second box and the first box updates instantly with the reverse conversion.