Clay Calculator

Estimate how much clay a piece needs before you start. Choose a shape, enter its dimensions or a known volume, set the clay density, and the tool gives the volume and an approximate weight in grams and ounces. This is an approximate estimate, not a quote — polymer, air-dry and earthenware clays differ in density, and hollowing or waste changes the amount, so weigh a sample piece to calibrate. All processing runs locally in your browser. Your data is not uploaded to any server. 100% Local

How to Use the Clay Calculator

Choose a shape, enter its dimensions (or a known volume for the volume option), and set the clay density. Press Estimate clay to see the volume and an approximate weight in grams and ounces.

What it accounts for

• Blocks use length times width times depth; cylinders and spheres use the diameter formula.
• The known-volume option is useful when you have already measured a piece.
• Weight is the volume times the density you enter.

Calibrating the density

Polymer clay is around 1.4-1.8 g/cm3, air-dry clay lower. If you are unsure, weigh a small ball of known size and back out the density. Treat the weight as an approximate estimate, not a quote, and allow extra for waste.

Features

• Volume and approximate weight in grams and ounces
• Block, cylinder, sphere and known-volume options
• Adjustable clay density
• Copy or download the estimate as a text file
• All processing runs locally in your browser. Your data is not uploaded to any server.
• Results are approximate estimates, not a quote. Clays differ in density and hollowing or waste changes the amount, so weigh a sample to calibrate and allow extra.

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