About this tool
Shrinkage & Scale Compensation Calculator is a free, in-browser tool that turns a measured versus designed dimension into the exact slicer scale percentage you need so the next print comes out at the size you actually wanted. Materials like ABS and ASA cool and contract, so a part modelled at 20 mm can measure a few tenths short — this tool quantifies that and tells you how much to scale up. Nothing is uploaded; every figure is computed locally as you type.
The shrinkage percentage is (nominal − measured) ÷ nominal × 100, and the scale factor your printer produced is measured ÷ nominal. To compensate you print at the reciprocal, so the recommended slicer scale is nominal ÷ measured × 100, and the compensated model dimension is target ÷ scaleFactor — the size to set the object to so it lands on the target after shrinking.
Use it after a calibration cube: enter the designed edge length and what your caliper reads, then apply the recommended scale in your slicer or CAD. Because the correction is a ratio it applies uniformly to every dimension of the model.