## 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 40 centimeters into kilometers we have to multiply 40 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

40 cm → L(km)

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

L(km) = 40 cm × 1.0E-5 km

L(km) = 0.0004 km

The final result is:

40 cm → 0.0004 km

We conclude that 40 centimeters is equivalent to 0.0004 kilometers:

40 centimeters = 0.0004 kilometers

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 2500 × 40 centimeters.

Another way is saying that 40 centimeters is equal to 1 ÷ 2500 kilometers.

## Approximate result

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

40 cm ≅ 0 km

An alternative is also that one kilometer is approximately two thousand five hundred times forty 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

centimeters (cm) kilometers (km)
41 centimeters 0 kilometers
42 centimeters 0 kilometers
43 centimeters 0 kilometers
44 centimeters 0 kilometers
45 centimeters 0 kilometers
46 centimeters 0 kilometers
47 centimeters 0 kilometers
48 centimeters 0 kilometers
49 centimeters 0 kilometers
50 centimeters 0.001 kilometers