31 millimeters in meters

Conversion formula
How to convert 31 millimeters to meters?

We know (by definition) that: $1\mathrm{mm}=0.001\mathrm{m}$

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

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

Conclusion: 31 ⁢ mm = 0.031 ⁢ m

Conversion in the opposite direction

The inverse of the conversion factor is that 1 meter is equal to 32.258064516129 times 31 millimeters.

It can also be expressed as: 31 millimeters is equal to $\frac{1}{\mathrm{32.258064516129}}$ meters.

Approximation

An approximate numerical result would be: thirty-one millimeters is about zero point zero three meters, or alternatively, a meter is about thirty-two point two five times thirty-one millimeters.