Pottery calculator

Drying shrinkage

Calculate the percentage change from wet to dry length.

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.