calculating pounds per square foot

[Al Fielder]

I have a 42" long by 20" deep, 3 drawer file cabinet. Total weight of the cabinet fully loaded is 535 lbs. How do I calculate the psf (pounds per square foot)?

[Guest]

I have a 42" long by 20" deep, 3 drawer file cabinet. Total weight of the cabinet fully loaded is 535 lbs. How do I calculate the psf (pounds per square foot)?

Footprint is 42' x 20" = 840 sq. in.
There are 144 sq. in. per sq ft., so 5.833 sq ft.
and 535/5.8333 = 91.7 lb/sq. ft/