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 4000 decimeters into kilometers we have to multiply 4000 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

4000 dm → L_(km)

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

L_(km) = 4000 dm × 0.0001 km

L_(km) = 0.4 km

The final result is:

4000 dm → 0.4 km

We conclude that 4000 decimeters is equivalent to 0.4 kilometers:

4000 decimeters = 0.4 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 2.5 × 4000 decimeters.

Another way is saying that 4000 decimeters is equal to 1 ÷ 2.5 kilometers.

Approximate result

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

4000 dm ≅ 0.4 km

An alternative is also that one kilometer is approximately two point five times four thousand 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