438 millimeters in inches

Conversion formula
How to convert 438 millimeters to inches?

We know (by definition) that: $1\mathrm{mm}\approx 0.039370079\mathrm{in}$

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

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

Conclusion: 438 ⁢ mm ≈ 17.244094602 ⁢ in

Conversion in the opposite direction

The inverse of the conversion factor is that 1 inch is equal to 0.0579908675799087 times 438 millimeters.

It can also be expressed as: 438 millimeters is equal to $\frac{1}{\mathrm{0.0579908675799087}}$ inches.

Approximation

An approximate numerical result would be: four hundred and thirty-eight millimeters is about seventeen point two three inches, or alternatively, a inch is about zero point zero six times four hundred and thirty-eight millimeters.