Wheel Throwing Weight Calculator
Clay & Shrinkage
claycalc.com
Wheel Throwing Weight Calculator
Calculate how much wet clay you need to throw a cylinder, mug, bowl, plate, or vase based on target dimensions and wall thickness.
Reviewed by ClayCalc Editorial · Updated
Typical thrown wall: 6–10mm.
Results
Enter your measurements above and click Calculate.
How Much Clay Do I Need?
The weight of clay needed to throw a vessel depends on the form geometry (wall area × wall thickness × clay density) plus a waste allowance for centering clay and trimming.
Geometric Model
Wet throwing clay has a density of approximately 1.75 g/cm³. The calculator models each vessel as its geometric equivalent:
- Cylinder / Mug: Cylindrical wall + flat base disc
- Bowl: Partial hemisphere wall + foot ring area
- Plate: Short rim ring + floor disc
- Vase: Tapered cylinder (average radius 85% of rim)
Waste Factors by Form
| Form | Waste Factor | Reason |
|---|---|---|
| Cylinder | 15% | Low trim waste |
| Mug | 20% | Handle + trimming |
| Bowl | 18% | Foot ring trimming |
| Plate | 22% | Wide centering waste |
| Vase | 22% | Tall form, neck shaping |
Quick Reference (standard dimensions)
| Form | Typical dimensions | Clay needed |
|---|---|---|
| Espresso cup | 6cm H × 6cm D | ~150g |
| Standard mug | 10cm H × 9cm D | ~350–450g |
| Dinner bowl | 8cm H × 18cm D | ~600–800g |
| Side plate | 2cm H × 22cm D | ~500–700g |
Results are estimates. Actual amounts vary by thrower efficiency and clay body density.
Method & review note
About this calculation
Uses measured dimensions or weights and a stated arithmetic model. Clay and forming method vary, so production decisions should use test pieces from the actual body and firing.
Reference: Digitalfire — Drying Shrinkage. See the editorial methodology for testing, precision and corrections.
Input handling: Values are sent to the ClayCalc server for this request and are not written to the application database.