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 490 decimeters into kilometers we have to multiply 490 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

490 dm → L_(km)

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

L_(km) = 490 dm × 0.0001 km

L_(km) = 0.049 km

The final result is:

490 dm → 0.049 km

We conclude that 490 decimeters is equivalent to 0.049 kilometers:

490 decimeters = 0.049 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 20.408163265306 × 490 decimeters.

Another way is saying that 490 decimeters is equal to 1 ÷ 20.408163265306 kilometers.

Approximate result

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

490 dm ≅ 0.049 km

An alternative is also that one kilometer is approximately twenty point four zero eight times four hundred ninety 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