397 millimeters in inches

Conversion formula
How to convert 397 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: 397 ⁢ mm ≈ 15.629921363000001 ⁢ in

Conversion in the opposite direction

The inverse of the conversion factor is that 1 inch is equal to 0.0639798488664987 times 397 millimeters.

It can also be expressed as: 397 millimeters is equal to $\frac{1}{\mathrm{0.0639798488664987}}$ inches.

Approximation

An approximate numerical result would be: three hundred and ninety-seven millimeters is about fifteen point six three inches, or alternatively, a inch is about zero point zero six times three hundred and ninety-seven millimeters.