A weight of 20 grams is equivalent to 0.71 ounces. This conversion is carried out by dividing the number of grams by 28.35 grams per ounce.
Ounces and pounds are the units used to measure newborns in the United States. In most other countries, the metric system is used, and birth weights are described in kilograms. There are 16 ounces in each pound and 1,000 grams in a kilogram. The average birth weight of a baby is 7 pounds and 8 ounces, or approximately 3.5 kilograms. As a reference, a developing fetus reaches a weight of 20 grams between the 12th and 13th week of gestation.