3D Printing Feed (Small-Scale) Calculator Examples
Worked FDM printing examples showing how nozzle settings, speed, and filament size affect feed rate and volumetric flow.
These worked examples show how different FDM print profiles change the plastic flow required from the hot end. They use the same rectangular extrusion-bead approximation as the calculator and are intended for profile planning and comparison.
How to Read Your Results
Volumetric flow in mm³/s is the main measure of melt demand placed on the hot end.
Filament feed rate in mm/s tells you how quickly the extruder must push the incoming filament.
A lower capacity percentage leaves more margin below the maximum flow value entered.
Compare profiles using the same material, nozzle, temperature, and realistic sustained maximum-flow estimate.
Use the result as a planning estimate and confirm demanding profiles with a small print test.
Assumptions & Important Notes
- Extrusion bead area is estimated as line width multiplied by layer height.
- All listed print speeds refer to active extrusion movement.
- Flow multiplier is assumed to apply evenly across the relevant printed features.
- The stated maximum volumetric flow is treated as a sustained capability rather than a guaranteed value.
Related Examples
Frequently Asked Questions
Can I use these examples for a different filament diameter?
Yes, but recalculate the feed rate using the diameter you actually use. Volumetric flow is based on deposited bead dimensions and speed, while filament diameter changes the required linear feed speed.
Which result should I compare with my hot-end flow limit?
Compare required volumetric flow in mm³/s with the maximum volumetric flow for your material and temperature.
Why can two profiles have similar feed rates but different print settings?
Different combinations of line width, layer height, speed, and filament diameter can produce similar linear filament movement while requiring different deposited bead geometry.
Should I use wall speed or infill speed in the calculator?
Calculate each important extrusion speed separately when they differ. Infill, walls, top layers, and supports can have different flow demands.
Ready to calculate your own result?
Use the live calculator with your own inputs, timing, and preferences.