When this helps
Calculate extruder steps per millimetre from a measured extrusion test. Start with Current extruder steps; this calculator reports New extruder steps.
Tools · Calibration
Marlin extruder steps
Calculate extruder steps per millimetre from a measured extrusion test.
Results
- New extruder steps
- 95.876289 steps/mm
Method
New steps = current steps × requested extrusion ÷ measured extrusion.
Worked example
Example inputs
- Current extruder steps
- 93 steps/mm
- Requested extrusion
- 100 mm
- Measured extrusion
- 97 mm
Calculated outputs
- New extruder steps
- 95.876289 steps/mm
How to read the result
With these example inputs, New extruder steps is 95.876289 steps/mm. Use that value for the setting or decision named above, and read the other outputs as supporting checks.
Common mistake
Do not leave Current extruder steps at the example value of 93 steps/mm unless it matches your own measurement.
Assumptions and limits
Measure the filament extruded using the firmware’s calibration procedure. Do not use printed cube errors to change X, Y or Z motor steps.