Conversion formula

The conversion factor from millimeters to kilometers is 1.0E-6, which means that 1 millimeter is equal to 1.0E-6 kilometers:

1 mm = 1.0E-6 km

To convert 100 millimeters into kilometers we have to multiply 100 by the conversion factor in order to get the length amount from millimeters to kilometers. We can also form a simple proportion to calculate the result:

1 mm → 1.0E-6 km

100 mm → L_(km)

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

L_(km) = 100 mm × 1.0E-6 km

L_(km) = 0.0001 km

The final result is:

100 mm → 0.0001 km

We conclude that 100 millimeters is equivalent to 0.0001 kilometers:

100 millimeters = 0.0001 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 10000 × 100 millimeters.

Another way is saying that 100 millimeters is equal to 1 ÷ 10000 kilometers.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that one hundred millimeters is approximately zero kilometers:

100 mm ≅ 0 km

An alternative is also that one kilometer is approximately ten thousand times one hundred millimeters.

Conversion table

millimeters to kilometers chart

For quick reference purposes, below is the conversion table you can use to convert from millimeters to kilometers