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 4000 millimeters into kilometers we have to multiply 4000 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

4000 mm → L_(km)

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

L_(km) = 4000 mm × 1.0E-6 km

L_(km) = 0.004 km

The final result is:

4000 mm → 0.004 km

We conclude that 4000 millimeters is equivalent to 0.004 kilometers:

4000 millimeters = 0.004 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 250 × 4000 millimeters.

Another way is saying that 4000 millimeters is equal to 1 ÷ 250 kilometers.

Approximate result

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

4000 mm ≅ 0.004 km

An alternative is also that one kilometer is approximately two hundred fifty times four thousand 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