Volumetric Flow Rate Calculator
Determine the maximum print speed your hotend can physically melt.
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• Standard V6 / Ender 3: ~12-15 mm³/s
• Volcano / High Flow: ~20-30 mm³/s
• UHF / Rapido: ~45+ mm³/s
What is Volumetric Flow Rate?
It is the volume of plastic your printer needs to melt per second to keep up with the print speed. It is calculated as: Layer Height × Line Width × Speed. If this number exceeds your hotend's ability to melt plastic, you will get underextrusion or a skipped extruder.
Why does this matter?
Many users try to print faster (e.g., 150mm/s) without realizing their hotend physically cannot melt filament that fast. If you increase your layer height (e.g., to 0.6mm) or nozzle size, your flow rate skyrockets even at slow speeds. This tool tells you the "Speed Limit" of your thermodynamics.
How do I find my max flow rate?
You can perform a "Max Volumetric Flow Test" (available in slicers like OrcaSlicer). Generally, a standard MK8 or V6 hotend tops out around 12-15 mm³/s. High-flow hotends like the Volcano or Bambu Lab hotends can reach 24-30 mm³/s or more.