WEBApr 24, 2024 · How do I convert ounces to grams? To convert ounces to grams, you need to know that 1 ounce is equal to approximately 28.35 grams. This conversion factor allows you to easily convert between the two units. For example, if you have 5 ounces, you would multiply 5 by 28.35 to get 141.75 grams.