Retraction pulls filament back when the nozzle travels between print areas, preventing oozing and stringing. The right settings depend on your extruder type and material.

Why does Bowden need more retraction than direct drive?

Bowden tubes are long and flexible, creating slack in the filament path. More retraction distance is needed to overcome this play and actually pull filament back from the nozzle.

How do I tune retraction?

Print a retraction tower test. Vary distance in 0.5mm increments. Once stringing stops, reduce speed until you find the minimum speed that still works. Lower values reduce wear on filament.

3DPrintCalcs

Retraction Calculator — Distance & Speed

Find starting retraction settings for your extruder type and material.

Extruder TypeDirect drive mounts the motor on the carriage (short filament path); Bowden pushes filament through a PTFE tube and needs more retraction.

MaterialFilament type — PETG strings more than PLA/ABS; TPU is flexible and needs minimal or no retraction.

How We Calculate This

Recommended Settings

Settings are based on community-tested starting values for each extruder and material combination. These are starting points — fine-tune with retraction towers for your specific setup.

Direct drive: Short retraction (0.5-2mm) due to minimal filament path.
Bowden: Longer retraction (3-6mm) to compensate for tube compliance.
Speed multiplier: Scale the recommended speed range up or down for your hotend (e.g. 0.8 for older hotends, 1.2 for high-flow setups).
Z-hop offset: A reminder value to set as your slicer Z-hop on retraction moves, lifting the nozzle to clear previously printed features. The tool echoes it back unchanged — it is not added to any base height.

Frequently Asked Questions

Related Calculators

Retraction Tuning Calculator

Calculate retraction distance, speed, travel speed, z-hop and stringing risk for your printer and material.

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Find optimal layer heights based on your nozzle size and desired quality.

Print Speed Calculator

Calculate maximum print speed based on volumetric flow rate and layer dimensions.

Print Time Estimator

Estimate total print time from layer count, speed and travel moves.

Nozzle Size Calculator

Determine suitable nozzle sizes for your desired detail level and print speed.

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Last updated: February 2026

All calculations are estimates. Always verify settings with test prints before committing to final prints.