The conversion factor
1 ounce equals 28.3495 grams. Multiply your ounces value by 28.3495 to get grams; divide to go back. For the reverse direction, use the grams to ounces converter or the full weight converter.
Where this conversion comes up
Mixing metric and imperial is a daily reality in travel, shipping, recipes, fitness apps, and spec sheets — this page gives the exact factor plus a scannable table for the values people actually need.