Pottery Calculators

Use PhotoPottery's calculators to help in your pottery making projects and pottery studio, and to find out more about clay properties, kilning, glazing, and mold making!

Pottery Calculators

Clay Shrinkage Ruler - Determine how large to make your pottery pieces based on your clay's shrink rate, so the final size meets your expectations. Also useful for calculating dimensions of replacement lids and other parts.
Clay Shrink Tester - Not sure what your clay's shrinkage rate is? Or, want to double check a clay type's shrink percentage? Calculate shows shrink rate from wet state to any other rate.
Cone Temperatures - Quick lookup of cone 022 to cone 14.
Cone Compare - Compare any two cones, see which fires to a higher temperature
Cone Chart - Customize a cone chart to hang in your studio or just compare pyrometric cone temperatures in fahrenheit or celsius!
Centering Calculator - Center sprigs, decals, image transfers on your pottery piece.

Kiln Calculators

Mold Making Calculators / Tools

Glaze Calculators

Volume Calculators

Calculate volume, surface area, and how much liquid a shape can hold:

PhotoPottery Calculators

Think it's expensive to run an electric kiln? You may be pleasantly surprised at how affordable firing a kiln actually is!

Not sure what the difference is between cone 6 and cone 06? And, which is hotter - cone 04 or cone 06? Instantly see cone to temperature conversions!

PhotoPottery calculators are helpful no matter where you do your pottery, from home or a studio. And, they work on most devices, from desktop to your mobile smartphone and tablets!

Percentage Calculators

Everyday percentage calculations for pottery (and beyond), such as calculating ingredient weights from glaze recipes in percentages, and percent change when kiln time or temperature varies from previous firing.

Percentages come in handy when comparing molds for pottery making, where they're automatically calculated based on how much the clay used shrinks.

				
					20% off pottery molds til 9/18/2025