Clay Shrink Tester Calculator

Calculate how much your clay body shrinks from when you build the pottery until after it is glazed. Or use it to calculate shrinkage between the wet state and any other state.

Use length, height, depth or diameter

Measure same dimension used in Wet State (more below)

Clay Size

In the above entry fields, make sure to measure and enter the same dimension (ie. height, width, depth, or diameter) for the clay when in the wet state and in the next state. For example, if you are calculating shrinkage for wet state through the glazed firing, select a dimension - such as height - and make sure to measure and enter height for the wet state and then again for the glazed firing state.