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 420 decimeters into kilometers we have to multiply 420 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

420 dm → L_(km)

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

L_(km) = 420 dm × 0.0001 km

L_(km) = 0.042 km

The final result is:

420 dm → 0.042 km

We conclude that 420 decimeters is equivalent to 0.042 kilometers:

420 decimeters = 0.042 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 23.809523809524 × 420 decimeters.

Another way is saying that 420 decimeters is equal to 1 ÷ 23.809523809524 kilometers.

Approximate result

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

420 dm ≅ 0.042 km

An alternative is also that one kilometer is approximately twenty-three point eight one times four hundred twenty 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