With this information, you can calculate the quantity of grams 21 ounces is equal to.

¿What is the inverse calculation between 1 gram and 21 ounces?

Performing the inverse calculation of the relationship between units, we obtain that 1 gram is 0.0016797125 times 21 ounces.

Which is the same to say that 21 ounces is 595.33999 grams.

Twenty-one ounces equals to five hundred ninety-five grams. *Approximation

A gram is zero times twenty-one ounces. *Approximation