1000 sqft is how many cubic ft?

Answer 1

None.

A cubic foot is a measure of volume in 3-dimensional space, whereas a square foot is a measure of area in 2-dimensional space. The two measure different things and, according to the basic rules of dimensional analysis, conversion from one to the other is not valid.

Answer 2

To find how many cubic feet are in 1000 square feet, you need to know the height or depth of the space. If we assume a height of 10 feet, then 1000 square feet would be equal to 10,000 cubic feet (1000 sq ft x 10 ft).