Line width

Definition

Line width (extrusion width) is how wide each deposited trace is. It is often 100–120% of nozzle diameter and can go to ~150% on thick infill. Perimeter walls that are not integer multiples of line width leave a thin leftover extrusion that under-extrudes or overfills. Round the wall to n × width, or change width so n × width hits the CAD thickness.

Calculators that use this

• 3D design & tolerances

  Wall Thickness vs Line Width

  Round a CAD wall to an integer number of FDM lines so shells are not a thin leftover extrusion. Suggests line count, actual thickness and a line width that hits the target exactly.

• FDM calibration & firmware

  Maximum Volumetric Flow Rate Calculator

  Compute FDM volumetric flow Q = layer height × line width × speed, then the maximum print speed a hotend can hold at a stated mm³/s limit.