About this calculator

Typical shrinkage: earthenware 6–8%, stoneware 10–12%, porcelain 12–14%. To get a 20 cm finished bowl in stoneware, throw it at ~22.7 cm.

Frequently asked questions

What does the Clay Shrinkage Calculator do?

Fired size from greenware dimensions for stoneware or earthenware. Typical shrinkage: earthenware 6–8%, stoneware 10–12%, porcelain 12–14%. To get a 20 cm finished bowl in stoneware, throw it at ~22.7 cm.

Is the Clay Shrinkage Calculator free to use?

Yes. Every calculator on Calcurly.com is free, works in your browser without sign-up, and can be embedded on your own website.

How accurate is the Clay Shrinkage Calculator?

Results are calculated in real time using industry-standard formulas. Treat the output as a well-informed estimate — always cross-check with local regulations, product datasheets, or a qualified pottery & ceramics professional before committing to a purchase or a job.

What inputs does the Clay Shrinkage Calculator need?

Enter values for: Greenware dimension (cm), Shrinkage %. Sensible defaults are pre-filled where possible so you can start with a single change.

Can I embed the Clay Shrinkage Calculator on my own website?

Yes — copy the iframe snippet at the bottom of this page, or use the Embed Generator to customise the size. The embedded version stays in sync with the live calculator on Calcurly.com.