What is 30 inches in cubic feet?

Answer:
None.

An inch is a measure of distance while a cubic foot is a measure of volume. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid.
First answer by Mehtamatics. Last edit by Mehtamatics. Contributor trust: 614 [recommend contributor recommended]. Question popularity: 1 [recommend question].