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Estimate 3D printing filament usage in grams and meters from model volume and infill. Plan material costs and spool requirements for FDM print jobs.
Calculate optimal layer height from nozzle diameter and print quality target. Set layer resolution as a fraction of nozzle size for best FDM results.
Calculate maximum volumetric flow rate for a 3D printer nozzle from temperature and material. Find hotend extrusion limits for speed tuning.
Flow rate (mm³/s) is the volume of filament extruded per second. It depends on hotend, nozzle size, temperature, and material. Typical PLA: 10–15 mm³/s on stock hotend.
Flow (mm³/s) = line width (mm) × layer height (mm) × speed (mm/s)Rearrange to find max speed at given flow capacity. Exceeding max flow causes under-extrusion, gaps, and weak layers.
Max speed (mm/s) = max flow (mm³/s) / (line width × layer height)Line width is typically 110–120% of nozzle diameter. A 0.4 mm nozzle often prints at 0.45–0.48 mm line width.
Line width ≈ nozzle diameter × 1.1–1.2Updated: July 2026
0.45 mm line × 0.20 mm layer = 0.09 mm² cross-section. Max speed = 12 / 0.09 ≈ 133 mm/s theoretical — practical limit ~80 mm/s accounting for acceleration.
0.40 mm line × 0.12 mm layer, 8 mm³/s PETG flow: max speed ≈ 167 mm/s but run 40–50 mm/s for quality and cooling time on small features.
0.60 mm line × 0.28 mm layer = 0.168 mm². Max speed = 25 / 0.168 ≈ 149 mm/s — enables fast large-format printing with 0.6 mm nozzle.
Slicer speed alone is meaningless without layer height and line width. Calculate actual mm³/s — a 0.4 mm nozzle at 0.2 mm layers rarely sustains above 12 mm³/s on stock hardware.
Bridges, overhangs, and small perimeters need slower speeds for cooling. Use modifier speeds or adaptive speed for quality-critical features.
Print speed must stay within your hotend's volumetric flow limit or extrusion fails. This calculator derives maximum print speed from flow rate (mm³/s), layer height, and line width.