## 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 4.5 ounces into kilograms we have to multiply 4.5 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

4.5 oz → M(kg)

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

M(kg) = 4.5 oz × 0.028349523125 kg

M(kg) = 0.1275728540625 kg

The final result is:

4.5 oz → 0.1275728540625 kg

We conclude that 4.5 ounces is equivalent to 0.1275728540625 kilograms:

4.5 ounces = 0.1275728540625 kilograms

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilogram is equal to 7.8386582110179 × 4.5 ounces.

Another way is saying that 4.5 ounces is equal to 1 ÷ 7.8386582110179 kilograms.

## Approximate result

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

4.5 oz ≅ 0.128 kg

An alternative is also that one kilogram is approximately seven point eight three nine times four point five 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)
5.5 ounces 0.156 kilograms
6.5 ounces 0.184 kilograms
7.5 ounces 0.213 kilograms
8.5 ounces 0.241 kilograms
9.5 ounces 0.269 kilograms
10.5 ounces 0.298 kilograms
11.5 ounces 0.326 kilograms
12.5 ounces 0.354 kilograms
13.5 ounces 0.383 kilograms
14.5 ounces 0.411 kilograms