Pottery calculator

Clay needed for a series

Calculate clay mass for a batch with waste and testing allowance.

How to use it

  1. Enter values from your measurement or equipment label.
  2. Calculate and review the assumptions.
  3. Record the result in a work, test or firing log.
Method

Shrinkage methods use measured dimensional change. Kiln cost is estimated from power, time and duty factor.

Limitation

This is an estimate. Verify it with a sample from the same material batch and firing schedule.

FAQ

Does this replace a physical test?

No. Materials and kilns vary, so the result is for planning and comparison.

Are values uploaded?

No. The calculation runs in your browser.