How to convert ounces to grams
To convert a measurement in ounces to grams, multiply the value by 28.349523. The conversion factor comes from the relationship between both units and the kilogram.
For example, to convert 5 oz to grams: 5 × 28.349523 = 141.747616 g.
What is a ounce?
An ounce is an imperial and US customary unit of mass equal to 1/16 of a pound or exactly 28.349523125 grams. The avoirdupois ounce descends from the Roman 'uncia' (one twelfth). It is distinct from the troy ounce used for precious metals, which is heavier at about 31.1 grams.
Common uses of ounces include: Food portions and recipe ingredients in the US; Postal and letter weights; Packaged goods net weight (cereal, snacks); Baby birth weights in the US.
What is a gram?
A gram is a metric unit of mass equal to one thousandth of a kilogram (0.001 kg) or about 0.035 ounces. Defined in 1795 as the mass of one cubic centimeter of water at the temperature of melting ice. The gram is the base for many everyday metric masses and the reference point for nutritional labeling worldwide.
Common uses of grams include: Cooking and recipe ingredient quantities; Nutrition labels and food portions; Postage and small parcel weight; Jewelry and precious metal weighing.
When you need to convert ounces to grams
Converting ounces to grams is essential when following a US recipe in a metric kitchen, reading nutrition information, or weighing precious metals. A standard 8 oz portion is about 227 grams.
Ounces to grams worked examples
Here are some common values converted:
1 oz = 28.349523 g 5 oz = 141.747616 g 10 oz = 283.495231 g 50 oz = 1,417.4762 g 100 oz = 2,834.9523 g
Frequently asked questions
How many grams are in one ounce?
One ounce (oz) equals 28.349523 grams (g). Multiply any value in ounces by 28.349523 to convert to grams.
How do I convert ounces to grams?
Multiply the value in ounces by 28.349523. For example, 5 oz × 28.349523 = 141.747616 g.
How do I convert grams to ounces?
Multiply the value in grams by 0.03527396195, or divide by 28.349523. Use the swap button on the converter above to reverse the direction.
Is the ounce to gram conversion exact?
Yes. Since 1959 the international pound is defined as exactly 0.45359237 kg, so all weight conversions between metric and avoirdupois units use exact factors.
What is the formula for ounces to grams?
The formula is: g = oz × 28.349523. This comes from the definition of both units relative to the kilogram.