Guides
Short, practical explanations of the questions that come up when you build at scale. Each guide links to the tool that does the arithmetic.
How to read model scale ratios1:35, 1/72, "quarter-inch scale", and why bigger N means a smaller model.
Converting between scales for kitbashingWhen a part from another scale will pass, and when it won't.
28 mm, 32 mm and heroic scaleWhy figure sizes aren't ratios, with a calculator that makes the assumption visible.
Railway scales and gaugesHO, OO, N, O and Z: scale and track gauge are different things.
Printing accurate scale rulersPrinter scaling, calibration marks, and how much to trust paper.