40 centimeters in kilometers

Conversion

40 centimeters is equivalent to 0.0004 kilometers.^[1]

Conversion formula
How to convert 40 centimeters to kilometers?

We know (by definition) that: $1 cm = 1e-05 km$

We can set up a proportion to solve for the number of kilometers.

\frac{1 cm}{40 cm} = \frac{1e-05 km}{x km}

Now, we cross multiply to solve for our unknown $x$ :

x km = \frac{40 cm}{1 cm} * 1e-05 km \to x km = 0.0004 km

Conclusion: $40 cm = 0.0004 km$

40 centimeters is equivalent to 0.0004 kilometers

Conversion in the opposite direction

The inverse of the conversion factor is that 1 kilometer is equal to 2500 times 40 centimeters.

It can also be expressed as: 40 centimeters is equal to $\frac{1}{2500}$ kilometers.

Approximation

An approximate numerical result would be: forty centimeters is about zero kilometers, or alternatively, a kilometer is about two thousand, five hundred times forty centimeters.

Units involved

This is how the units in this conversion are defined:

Centimeters

A centimetre (symbol cm) or centimeter (American spelling) is a unit of length in the metric system, equal to one hundredth of a metre, centi being the SI prefix for a factor of 1⁄100.

Wikipedia page of centimeters

Kilometers

The kilometre or kilometer (American spelling) is a unit of length in the metric system, equal to one thousand metres (kilo being the SI prefix for 1000). It is now the measurement unit used officially for expressing distances between geographical places on land in most of the world; notable exceptions are the United States and the road network of the United Kingdom where the statute mile is the official unit used.

Wikipedia page of kilometers

Footnotes

[1] The precision is 15 significant digits (fourteen digits to the right of the decimal point).

Results may contain small errors due to the use of floating point arithmetic.

Conversion

Conversion formula How to convert 40 centimeters to kilometers?

Conversion in the opposite direction

Approximation

Conversion formula
How to convert 40 centimeters to kilometers?