4 centimeters in decimeters

Result

The conversion result is: 4 centimeters is equivalent to 0.4 decimeters.^[1]

Conversion formula
How to convert 4 centimeters to decimeters?

We know (by definition) that: 1 cm = 0.1 dm.

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

1 cm / 4 cm = 0.1 dm / x dm

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

x dm = (4 cm / 1 cm) * 0.1 dm → x dm = 0.4 dm

Conclusion:

4 cm = 0.4 dm

Conversion in the opposite direction

The inverse of the conversion factor is that 1 decimeter is equal to 2.5 times 4 centimeters.

It can also be expressed as: 4 centimeters is equal to 1 / 2.5 decimeters.

Approximation

An approximate numerical result would be: four centimeters is about zero decimeters, or alternatively, a decimeter is about zero times four centimeters.