Seems the calculator is designed for a "collection of boxes", which I guess is a start, but when I hear "organizer" a collection of separate boxes ain't what I want. The most significant factor of making one's own is that it's 105% customized to the need, no more no less. That means usually a lot of thought between "target place bounding box" vs "bounding boxes of things the holder shall hold".

For "organize a drawer, quickly!" I got myself a couple of sets of "modular" boxes - they have little tabs on their sides so one can snap them together like lego.

Pro: Your drawers are neater now.

Con: You just spent maybe 100x of the time and effort you would have spent if you had just left your drawer messy, and had to search through it.

My back of the napkin math is that you go into an average drawer once a week, and mess makes it take five seconds longer to find something than in a clean drawer. Assuming you live 20 years before the drawer falls apart, you move, etc. that's roughly 20 * 50 * 5 = 5,000 seconds.

Now, read the article and tell me what multiple of 5,000 seconds the OP put into all that custom foam.

Cut the same angle on the top inside and bottom outside and you can stack shallow foamcore bins in deeper drawers. Lots of other handy uses for an adjustable bevel cutter and foamcore boards.

My favorite activity I ever did with foamcore was to make a to-scale layout of an apartment my wife and I were moving into so that we could experiment with simple to-scale rectangles as stand-ins for furniture to figure out our layout.

What a wonderful material!