## Conversion formula

The conversion factor from ounces to kilograms is 0.028349523125, which means that 1 ounce is equal to 0.028349523125 kilograms:

1 oz = 0.028349523125 kg

To convert 21 ounces into kilograms we have to multiply 21 by the conversion factor in order to get the mass amount from ounces to kilograms. We can also form a simple proportion to calculate the result:

1 oz → 0.028349523125 kg

21 oz → M(kg)

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

M(kg) = 21 oz × 0.028349523125 kg

M(kg) = 0.595339985625 kg

The final result is:

21 oz → 0.595339985625 kg

We conclude that 21 ounces is equivalent to 0.595339985625 kilograms:

21 ounces = 0.595339985625 kilograms

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilogram is equal to 1.6797124737895 × 21 ounces.

Another way is saying that 21 ounces is equal to 1 ÷ 1.6797124737895 kilograms.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that twenty-one ounces is approximately zero point five nine five kilograms:

21 oz ≅ 0.595 kg

An alternative is also that one kilogram is approximately one point six eight times twenty-one ounces.

## Conversion table

### ounces to kilograms chart

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

ounces (oz) kilograms (kg)
22 ounces 0.624 kilograms
23 ounces 0.652 kilograms
24 ounces 0.68 kilograms
25 ounces 0.709 kilograms
26 ounces 0.737 kilograms
27 ounces 0.765 kilograms
28 ounces 0.794 kilograms
29 ounces 0.822 kilograms
30 ounces 0.85 kilograms
31 ounces 0.879 kilograms