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Shrinkage Calculator

Calculate final dimensions of ceramic pieces accounting for clay body shrinkage through drying and firing.

Inputs

mm
mm
mm

Results

Drying Shrinkage

6.0%

Firing Shrinkage

6.4%

Total Shrinkage

12.0%

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Tips

1
Make test tiles with each new clay body. Manufacturer specs are averages, and your kiln may differ.
2
Measure shrinkage in all directions. Some clays shrink unevenly depending on forming method.

Open formula

Final Size = Wet Size × (1 - Dry Shrinkage%) × (1 - Fire Shrinkage%)

Applies two shrinkage stages: drying (5-7%) and firing (5-12% depending on clay and temperature).

Total: 10-15% for stoneware, 12-18% for porcelain.

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