Difference between cu ft and lbs?
There are many differences between cu ft. and lbs. These are all very different ways to measure very different things.
This question cannot be answered sensibly. A cu ft is a measure of volume, with dimensions [L3]. A pound is a measure of mass, with dimensions [M]. Basic dimensional analysis teaches that you cannot convert between measures with different dimensions such as these without additional information. As a simple mental exercise consider a cu ft of air and a cu ft of water. They will have very different weights.