40 millimeters in meters

Result

The conversion result is: 40 millimeters is equivalent to 0.04 meters.^[1]

Conversion formula
How to convert 40 millimeters to meters?

We know (by definition) that: 1 mm = 0.001 m.

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

1 mm / 40 mm = 0.001 m / x m

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

x m = (40 mm / 1 mm) * 0.001 m → x m = 0.04 m

Conclusion:

40 mm = 0.04 m

Conversion in the opposite direction

The inverse of the conversion factor is that 1 meter is equal to 25 times 40 millimeters.

It can also be expressed as: 40 millimeters is equal to 1 / 25 meters.

Approximation

An approximate numerical result would be: forty millimeters is about zero meters, or alternatively, a meter is about zero times forty millimeters.