Shrinkage Compensation Calculator

Calculate mold cavity dimensions to compensate for plastic shrinkage in flow, cross-flow, and thickness directions. Assesses warpage risk and tolerance feasibility.

Inputs

Nominal length (mm)

Nominal width (mm)

Nominal height (mm)

Shrinkage, flow dir (%)

Shrinkage, cross-flow (%)

Shrinkage, thickness (%)

Part tolerance (mm)

Tab to move between fields

Results

Mold length (mm)

101.52

Mold width (mm)

50.92

Mold height (mm)25.51

Length compensation (mm)1.52

Width compensation (mm)0.92

Height compensation (mm)0.51

Volumetric shrinkage (%)5.21

Anisotropy ratio1.2

Warpage risk (1-3)2

Tolerance feasible (0/1)0

How to Use This Calculator

Enter Nominal length (mm), Nominal width (mm), and Nominal height (mm).
Set Shrinkage, flow dir (%), Shrinkage, cross-flow (%), and Shrinkage, thickness (%).
Adjust Part tolerance (mm) as needed.
Review Mold length (mm) and Mold width (mm).
Use Mold height (mm) and Length compensation (mm) to inform your decision.

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