Pottery Calculator


One of the surprises of pottery is how much clay shrinks as it dries and is fired. Wet clay can shrink by up to 20%, depending on the type of clay and the temperature of the firing. This shrinkage can be dramatic, but it's important to keep in mind when you're making pottery, so that you can create pieces that will be the right size once they're finished. To help potters with the math of shrinkage, I've created a shrinkage converter: