Finished Piece Size Calculator
Calculate what your pottery piece will measure after firing
Know your final size before firing! Enter your green (wet) dimensions and clay shrinkage rate to see exactly what your piece will measure after firing.
Calculate Finished Dimensions
Finished Dimensions
Enter your green dimensions to see the finished size!
How the Finished Size Calculator Works
Enter Green Dimensions
Measure your piece while it's still wet/green. This is the size before any firing.
Set Shrinkage Rate
Enter your clay's shrinkage percentage. Check with your clay supplier for the exact rate.
Get Finished Size
See exactly what your piece will measure after firing. Perfect for planning and consistency.
Plan Your Work
Use the finished dimensions to plan your pottery projects and ensure consistent results.
Frequently Asked Questions
How accurate is the finished size calculation?
The calculation is mathematically precise based on your clay's shrinkage rate. However, actual results may vary slightly due to firing conditions, clay consistency, and other factors.
What if I don't know my clay's shrinkage rate?
Most stoneware clays shrink 10-15%. Check with your clay supplier for the specific shrinkage rate of your clay body. You can also test by measuring a piece before and after firing.
Does firing temperature affect shrinkage?
Yes, higher firing temperatures generally result in more shrinkage. Use the shrinkage rate that corresponds to your typical firing temperature and clay body.
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