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 1980 decimeters into kilometers we have to multiply 1980 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

1980 dm → L_(km)

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

L_(km) = 1980 dm × 0.0001 km

L_(km) = 0.198 km

The final result is:

1980 dm → 0.198 km

We conclude that 1980 decimeters is equivalent to 0.198 kilometers:

1980 decimeters = 0.198 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 5.0505050505051 × 1980 decimeters.

Another way is saying that 1980 decimeters is equal to 1 ÷ 5.0505050505051 kilometers.

Approximate result

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

1980 dm ≅ 0.198 km

An alternative is also that one kilometer is approximately five point zero five one times one thousand nine hundred eighty 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