Tools you might need next
Calculate clay shrinkage percentage from wet, dry, and fired dimensions. Plan pottery sizes accurately for clay bodies from leather-hard through glaze firing.
Calculate uniform wall thickness from outer and inner diameters of thrown ware. Free wall thickness calculator for wall, thickness, and more.
Estimate optimal wheel head speed based on piece diameter for centering and trimming. Free wheel speed calculator for wheel, speed, and more.
This tool applies a standard formula from the relevant domain. The computation is deterministic — given the same inputs, the result is always identical. The formula accounts for the primary variables that determine the output.
Plaster kg = Cavity cm³ × 0.0022 × Safety factorThe calculation requires: Mold Length, Mold Width, Mold Depth, Safety Factor. Each parameter contributes to the final result according to the formula above. Accuracy depends on the precision of your input measurements.
Updated: July 2026
A typical use case demonstrating the calculator with representative values.
→ Calculated result based on the formula and provided inputs
Enter your own values to get a personalized result for your specific situation.
→ Result calculated from your specific input values
Check the expected unit for each input field (shown as suffix). Converting between imperial and metric units before entering values prevents calculation errors.
When a formula combines multiple measurements, all inputs must use compatible units. Convert everything to the same system (metric or imperial) before calculating.
Estimate plaster volume and weight for a one-piece or multi-part ceramic mold. Free mold volume calculator for mold, volume, and more. It applies the calculation formula (Plaster kg = Cavity cm³ × 0.0022 × Safety factor). For example: 25×20×15 cm mold block — A typical use case demonstrating the calculator with representative values.