320 millimeters in inches

Conversion formula
How to convert 320 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: 320 ⁢ mm ≈ 12.59842528 ⁢ in

Conversion in the opposite direction

The inverse of the conversion factor is that 1 inch is equal to 0.079375 times 320 millimeters.

It can also be expressed as: 320 millimeters is equal to $\frac{1}{\mathrm{0.079375}}$ inches.

Approximation

An approximate numerical result would be: three hundred and twenty millimeters is about twelve point five nine inches, or alternatively, a inch is about zero point zero eight times three hundred and twenty millimeters.