Is there a quick and dirty way/formula to calculate the approximate surface area of an an adult male human foot based on standard width foot and making adjustments for length?
Trying to calculate estimate approx lbs per sq inch loading on a foot for a given body weight without spending 30 minutes with a ruler and a calculator.
ie
male 8 medium = xx sq inches (on average)
male 13 wide = xx sq inches
Easiest way: treat foot as rectangle; multiply width by length, subtract a few square inches.
Slightly harder way: break foot into handful of geometric shapes with easily calculable areas (rectangles and triangles, mainly). Calculate areas; add.
Unless you are thinking of theoretical conditions, real life conditions are not going to have much to do with shoe size, not to mention that pressure is not evenly spread on the sole. Also, the tread means the pressure is not equal even when considering small areas. If you tell us what you are trying to do maybe we can come up with a better approximation.
The best approximation on short notice would surely be:
WidthLength(MyFootArea/(MyFootWidth*MyFootLength))
But I’ve no idea how much foot area varies.
Any foot specialists out there?