LayerBench3DTHE FDM WORKBENCH

Free guides and tools for FDM 3D printing

FDM CALCULATOR

Scale a 3D model

Calculate theoretical dimensions to enter in your slicing software while preserving proportions.

Change the inputs, then choose Calculate. Changing an input hides the previous result.

Your inputs

Editable example values · no measurements made by this site.

Initial dimensions
mm
Strictly positive value.
mm
Strictly positive value.
mm
Strictly positive value.
Desired dimension
mm
This target sets the same factor for all three axes.

Use a decimal point or comma. No thousands separators, exponents or units in fields. Example: 1000.5, not 1,000.5.

Formulas and assumptions

Formulas and assumptions

  • Factor = target dimension / initial dimension of reference axis
  • Scale (%) = factor × 100; change (%) = (factor − 1) × 100
  • Final dimension = initial dimension × factor, for each of the three axes
  • Scaling to 25% means a 75% reduction. Reducing by 25% means scaling to 75%.

No intermediate rounding. Quantities use up to two decimal places, energy three; very small values use scientific notation.

Inputs: zero where allowed, otherwise 0.000001 to 1,000,000,000. Absolute results are limited to 1,000,000,000,000. These technical limits do not describe printer capabilities.

Limitations to consider

  • Proportions are preserved; the site does not modify an STL file or 3D model.
  • Scaling does not guarantee mechanical fit or compensate for shrinkage.
  • This tool does not predict extruded mass, print duration or slicing effects.
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Further reading