About this tool
Layer Count & Print Height Calculator is a free, in-browser tool that works out how many layers a print will have and the exact Z height it reaches, from the object's height, the layer height and a separate first-layer height. It is useful for estimating time, planning colour or filament changes at a given layer, and checking that a model's height divides cleanly. Everything runs locally with nothing uploaded.
The printer lays a thicker first layer for adhesion, then stacks the rest at the normal layer height, so the number of layers is ceil((height − firstLayer) ÷ layerHeight) + 1, and the actual print height is firstLayer + (layers − 1) × layerHeight. Because the count is rounded up, the finished height can land slightly above the target — the height-delta tile shows that rounding difference.
Use it to find, say, which layer sits at 5 mm for a filament swap, or to see how switching from 0.2 mm to 0.28 mm layers cuts the layer count. For a 20 mm object at 0.2 mm layers with a 0.2 mm first layer, that is 100 layers reaching exactly 20 mm.