Method before confidence

Rectangle math, with the assumptions left visible.

These tools are measurement scratchpads, not product or game-system authorities.

Fit checkTests the entered footprint as entered and, when enabled, after a 90° turn. Entered clearance is reserved on both sides of width and depth. Coverage is physical module area divided by physical table area.

ComparisonUses floor division in two axes, so every counted module is complete. It compares rectangular grids; it does not rearrange irregular geometry.

AllocationUses complete footprint slots and complete vertical layers. Storage units are filled in the entered order. Non-stackable modules get at most one layer.

What this does not determine

It does not determine weight limits, crush risk, foam compression, handles, lids, wall thickness, access paths, overhang safety, terrain stability, miniature scale, edge compatibility or rules legality. Measure the actual usable opening and choose your own clearances.

Optional edge labels are displayed only as your notes. They never trigger an inferred matching rule. No catalog, manufacturer dimensions, game rules or compatibility list is included.