Free tools for the ceramic workbench
Measure the clay.
Keep the firing notes.
Let us do the arithmetic.
Shrinkage, glaze batches, kiln costs and studio planning—each calculator shows its method, useful limits and the next measurement worth recording.
Start with a common task
Search across 52 calculators
A useful starting set
Featured calculators
Free Pottery & Ceramic Calculators for Every Stage of the Process
Whether you're a studio potter calculating clay shrinkage for fitted lids, a student working through glaze chemistry, or a ceramic engineer scaling a glaze batch for production, ClayCalc gives you the same consistent arithmetic in seconds while keeping the assumptions and limits visible.
No account or paywall is required. Calculator inputs are sent to the ClayCalc calculation endpoint, used to return the result, and are not stored in the application database. From kiln cone temperatures and firing schedules to pottery pricing and studio break-even, every formula is named, verifiable, and documented — not a black box.
What the calculators do—and what they do not
The arithmetic is deterministic. The studio outcome still depends on the measurement, material, firing and assumptions you enter.
Named method
Direct calculations show the equation; estimates identify their adjustable coefficients and assumptions.
Range checks
Clearly unusual inputs trigger a warning, without pretending a plausible value is automatically correct.
Studio verification
Guides show how to make a test record and when a manufacturer, standard or physical test takes priority.
Field notes
A better number starts with a better test.
Use the studio guides for preparation steps, source links and printable records that stay with the result.
Browse all guides →