4 centimeters in inches

Conversion formula
How to convert 4 centimeters to inches?

We know (by definition) that: $1\mathrm{cm}\approx 0.39370079\mathrm{in}$

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

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

Conclusion: 4 ⁢ cm ≈ 1.57480316 ⁢ in

Conversion in the opposite direction

The inverse of the conversion factor is that 1 inch is equal to 0.635 times 4 centimeters.

It can also be expressed as: 4 centimeters is equal to $\frac{1}{\mathrm{0.635}}$ inches.

Approximation

An approximate numerical result would be: four centimeters is about one point five seven inches, or alternatively, a inch is about zero point six four times four centimeters.