Free pottery calculators.
The same materials engine that powers Claybench's production planner, free to use. No account needed.
Clay weight calculator
How much clay for 50 mugs? Pick a form, set quantity and trim waste, get pounds and bags.
Shrinkage calculator
Work backwards from a fired size to a throwing size — or forwards — for any clay body.
Drying time estimator
Wet to leather-hard to bone-dry, from wall thickness, clay body, and studio humidity.
Claybench runs these numbers for every piece automatically.
Plan a production run and the clay math, drying windows, and kiln schedule come with it.