EasyScaleCalc

Every scale is just a ratio: 1:72 means the model is one seventy-second of the real thing, in every dimension. The tricky part is never the idea — it’s doing the math across mixed units (a wingspan in feet, a model in millimeters) without a slip. That’s the whole job of this model making calculator and model scale converter above: type any two of real size, scale, and scaled size, and it fills in the third, in whatever units you happen to have. It also outputs the exact percentage to enter in a 3D-print slicer — see the dedicated percent scale calculator for slicer-specific workflows. Built by a product designer and 3D-printing hobbyist