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 420 centimeters into kilometers we have to multiply 420 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

420 cm → L_(km)

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

L_(km) = 420 cm × 1.0E-5 km

L_(km) = 0.0042 km

The final result is:

420 cm → 0.0042 km

We conclude that 420 centimeters is equivalent to 0.0042 kilometers:

420 centimeters = 0.0042 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 238.09523809524 × 420 centimeters.

Another way is saying that 420 centimeters is equal to 1 ÷ 238.09523809524 kilometers.

Approximate result

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

420 cm ≅ 0.004 km

An alternative is also that one kilometer is approximately two hundred thirty-eight point zero nine five times four hundred twenty 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