Conversion formula

The conversion factor from centimeters to kilometers is 1.0E-5, which means that 1 centimeter is equal to 1.0E-5 kilometers:

1 cm = 1.0E-5 km

To convert 399.9 centimeters into kilometers we have to multiply 399.9 by the conversion factor in order to get the length amount from centimeters to kilometers. We can also form a simple proportion to calculate the result:

1 cm → 1.0E-5 km

399.9 cm → L_(km)

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

L_(km) = 399.9 cm × 1.0E-5 km

L_(km) = 0.003999 km

The final result is:

399.9 cm → 0.003999 km

We conclude that 399.9 centimeters is equivalent to 0.003999 kilometers:

399.9 centimeters = 0.003999 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 250.06251562891 × 399.9 centimeters.

Another way is saying that 399.9 centimeters is equal to 1 ÷ 250.06251562891 kilometers.

Approximate result

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

399.9 cm ≅ 0.004 km

An alternative is also that one kilometer is approximately two hundred fifty point zero six three times three hundred ninety-nine point nine centimeters.

Conversion table

centimeters to kilometers chart

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