Conversion formula

The conversion factor from decimeters to kilometers is 0.0001, which means that 1 decimeter is equal to 0.0001 kilometers:

1 dm = 0.0001 km

To convert 646.4 decimeters into kilometers we have to multiply 646.4 by the conversion factor in order to get the length amount from decimeters to kilometers. We can also form a simple proportion to calculate the result:

1 dm → 0.0001 km

646.4 dm → L_(km)

Solve the above proportion to obtain the length L in kilometers:

L_(km) = 646.4 dm × 0.0001 km

L_(km) = 0.06464 km

The final result is:

646.4 dm → 0.06464 km

We conclude that 646.4 decimeters is equivalent to 0.06464 kilometers:

646.4 decimeters = 0.06464 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 15.470297029703 × 646.4 decimeters.

Another way is saying that 646.4 decimeters is equal to 1 ÷ 15.470297029703 kilometers.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that six hundred forty-six point four decimeters is approximately zero point zero six five kilometers:

646.4 dm ≅ 0.065 km

An alternative is also that one kilometer is approximately fifteen point four seven times six hundred forty-six point four decimeters.

Conversion table

decimeters to kilometers chart

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