THE NUMBERS, EXPLAINED
How to use this calculator.
Proportional correction for a steps-per-mm setting only. Rotation-distance settings use the reciprocal correction. Retest measured extrusion and follow the printer manufacturer procedure; this tool does not send commands.
Start with your inputs
Enter commanded length (mm), measured length (mm), current steps per mm. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Commanded length (mm) | 100 |
| Measured length (mm) | 95 |
| Current steps per mm | 100 |
A worked example
With the example inputs above, proposed steps per mm is 105.263158. Change the inputs to explore your own scenario.
Putting the example numbers into the formula
Proposed steps per mm
(100) × (100) ÷ (95) = 105.263158
Measured error (%)
((95)-(100)) ÷ (100) × 100 = -5
| Result | Example answer |
|---|---|
| Proposed steps per mm | 105.263158 |
| Measured error (%) | -5 |
How this is calculated
Proposed steps per mm
c × a ÷ b
Measured error (%)
(b-a) ÷ a × 100
Symbols and units
- a
- Commanded length (mm)
- b
- Measured length (mm)
- c
- Current steps per mm
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions and limits
Proportional correction for a steps-per-mm setting only. Rotation-distance settings use the reciprocal correction. Retest measured extrusion and follow the printer manufacturer procedure; this tool does not send commands.
Calculations use the values you enter. Blank or invalid inputs show an error instead of silently substituting zero. Results are displayed to useful precision; calculations retain the underlying numeric precision.
Questions about this tool
What does the result tell me?
Proposed steps per mm; Measured error (%). The result applies to the method and inputs described above. Check the units and assumptions before using it in a decision.
Why might another calculator differ?
Differences in units, rounding, timing or model definitions can produce different answers. Compare the input definitions and the method, rather than only the final number. For this tool: Proportional correction for a steps-per-mm setting only. Rotation-distance settings use the reciprocal correction. Retest measured extrusion and follow the printer manufacturer procedure; this tool does not send commands.
Are my inputs stored or sent to AI?
Calculations on this page happen in your browser. The separate AI question finder sends its submitted conversation to OpenAI; these calculator fields are not sent. Favourites and recent tool names are stored locally. A shared link contains the inputs you choose to include.
Further reading
Klipper: calibration conventions and limitations ↗
Background reading; this does not imply endorsement or independent review of SumFizz.
Review status
Software example and browser checks are recorded in our quality report. No external expert review is claimed. Created with coding assistance; calculations run as ordinary browser code.
Read the quality report →