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Extruder steps calibration calculator

Calculate new extruder steps per millimetre from your current setting and measured extrusion.

Enter the current steps per millimetre, requested extrusion length and actual measured length.

Enter your values, then calculate.

Method and limitations

New steps = old steps × requested length / actual length. Both lengths must use the same unit and all inputs must be positive. This is a proportional calculation only. Repeat the measurement to check the result; slipping, blockage or measurement error can invalidate it. Use only for firmware configured in steps per millimetre; this is not a rotation-distance or slicer flow calibration.

Sources

No external reference is documented for this calculation; its method and limitations are described above.