Conversion formula

The conversion factor from ounces to grams is 28.349523125, which means that 1 ounce is equal to 28.349523125 grams:

1 oz = 28.349523125 g

To convert 20.5 ounces into grams we have to multiply 20.5 by the conversion factor in order to get the mass amount from ounces to grams. We can also form a simple proportion to calculate the result:

1 oz → 28.349523125 g

20.5 oz → M_(g)

Solve the above proportion to obtain the mass M in grams:

M_(g) = 20.5 oz × 28.349523125 g

M_(g) = 581.1652240625 g

The final result is:

20.5 oz → 581.1652240625 g

We conclude that 20.5 ounces is equivalent to 581.1652240625 grams:

20.5 ounces = 581.1652240625 grams

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gram is equal to 0.0017206810707112 × 20.5 ounces.

Another way is saying that 20.5 ounces is equal to 1 ÷ 0.0017206810707112 grams.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that twenty point five ounces is approximately five hundred eighty-one point one six five grams:

20.5 oz ≅ 581.165 g

An alternative is also that one gram is approximately zero point zero zero two times twenty point five ounces.

Conversion table

ounces to grams chart

For quick reference purposes, below is the conversion table you can use to convert from ounces to grams