Max print speed & layer height calculator

Your hotend can only melt so much plastic per second — this turns that limit into a hard speed ceiling. Pushing flow on a freshly calibrated extruder? Verify with the rotation distance calculator and keep dimensional accuracy with shrinkage compensation.

How it works

Volumetric flow is the budget: speed = flow ÷ line width ÷ layer height. The flow presets are measured max-flow values in the style of Ellis' max volumetric flow test— your real number depends on material and temperature, so test yours. Layer height follows the Prusa KB rule: at most 80% of the nozzle diameter (above that the new bead does not bond to the layer below), and practically at least 25% of it. Line width prints best at 100–120% of the nozzle. Source: Prusa KB — Layers and perimeters.