So, we can see that the answer for converting 1 oz to g is: 1 Ounce equals 28.349523 Grams . See also: 1 Gram to Ounces. Convert 1 oz to g. How many g in an oz? Our free converter quickly and accurately converts 1 Ounce to Grams, offering reliable results and calculations. 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. 1 ounce (oz) is equal to 28.34952 grams (g). Ounces (oz) to Grams (g) weight conversion calculator and how to convert. To convert grams to ounces first substitute the gram value into the above formula, and then execute the calculation. If we wanted to calculate 1 gram in ounces we follow these steps: