How to convert 438 millimeters to feet?
We know (by definition) that:
We can set up a proportion to solve for the number of feet.
Now, we cross multiply to solve for our unknown :
Conversion in the opposite direction
The inverse of the conversion factor is that 1 foot is equal to 0.695890410958904 times 438 millimeters.
It can also be expressed as: 438 millimeters is equal to feet.
An approximate numerical result would be: four hundred and thirty-eight millimeters is about one point four three feet, or alternatively, a foot is about zero point seven zero times four hundred and thirty-eight millimeters.
 The precision is 15 significant digits (fourteen digits to the right of the decimal point).Results may contain small errors due to the use of floating point arithmetic.