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 21.7 decimeters into kilometers we have to multiply 21.7 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

21.7 dm → L_(km)

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

L_(km) = 21.7 dm × 0.0001 km

L_(km) = 0.00217 km

The final result is:

21.7 dm → 0.00217 km

We conclude that 21.7 decimeters is equivalent to 0.00217 kilometers:

21.7 decimeters = 0.00217 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 460.82949308756 × 21.7 decimeters.

Another way is saying that 21.7 decimeters is equal to 1 ÷ 460.82949308756 kilometers.

Approximate result

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

21.7 dm ≅ 0.002 km

An alternative is also that one kilometer is approximately four hundred sixty point eight two nine times twenty-one point seven 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