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Makers & 3D Printing

3D Print Scale Calculator

Scale a model dimension by percentage or calculate the scale needed for a target size.

Use either target size or scale percentage. Check slicer units before printing.

Notes and next steps

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How it works

Convert model size changes into a slicer scale percentage.

Conversion used: Scale % = target size ÷ original size × 100.

Worked example

Changing a 50 mm model to 75 mm is 150% scale.

Common mistakes
  • Scaling only one axis accidentally.
  • Ignoring tolerances for functional parts.
  • Forgetting that volume changes faster than length.
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