Isaac Hill wrote:About how many cubic feet do 1500 balls take up? The room I'm thinking of using is around 10' x 11', and I want to go around 3' deep, and I'm wondering how many I need.
Well, my ball pit is a little less than two feet deep I'd say. It's under a queen size bed so the lofted frame that acts as the boundary is 5' X 7". That's roughly 70 cubic feet but there's also a little sofa in there so that there's a place to sit outside the balls and takes up some of the volume, making the rest of it deeper. So I don't really know how many cubic feet I have in practice. But there's an on-line calculator inspired by Randall's comic.