MAKE IT FIT · PRINTVELD TOOLS
Model scaling
calculator.
A part is almost the right size. Find the uniform scale percentage that takes one known dimension to your target.
Your inputs
EDITABLE EXAMPLESTHE NEXT LAYER
Your estimate
Adjust the examples, then select Calculate.
BEHIND THE NUMBERS
Resize with a clear target
Divide the target dimension by the current dimension to get the scale factor. Multiply by 100 to get the percentage to enter for uniform scaling. For example, 100 mm to 150 mm means 150% scale, or 1.5× each dimension.
With uniform scaling, geometric area changes by the factor squared and geometric volume by the factor cubed. These are mathematical comparisons, not predictions of filament use or print time. Re-slice the resized model: walls, infill and supports can behave differently.
Further reading: PrusaSlicer’s scaling tools ↗
Scale (%) = target dimension ÷ current dimension × 100
Area factor = scale factor² · Volume factor = scale factor³
Useful to know
What does a result of 150% mean?
Set the model to 150% of its original size. Each dimension becomes 1.5 times as large; the increase in each dimension is 50%.
Can I use centimetres or inches instead?
Yes, if both input values use the same unit. The ratio and scaling percentage are unchanged.
Will scaling make a functional part fit?
Scaling changes every dimension, including holes and wall thickness. Clearance, shrinkage and printer calibration still matter. Test-fit functional parts and re-slice after changing size.
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