How much clay do I need for a mug?
A 12 oz mug is usually thrown from 1 to 1.25 lb (450–570 g), plus 2–4 oz for a pulled handle. Thin-walled porcelain mugs can come in nearer 400 g. Hand-built mugs need about 25–35% more clay.
How much clay for a mug, bowl, plate or vase? Pick a forming method, form and size to get a weight range with trimming loss or hand-building waste included.
Suggested clay weight
495–602 g
1.09–1.33 lb · Add 60–110 g for a pulled handle.
Typical moist-clay weights for wheel-thrown forms. Add 25–35% for hand-built pieces.
| Form | Size | Clay weight |
|---|---|---|
| Espresso cup | 3 oz | 180–250 g / 6–9 oz |
| Mug | 12 oz | 450–570 g / 1–1.25 lb |
| Large mug | 16 oz | 570–700 g / 1.25–1.5 lb |
| Cereal bowl | 6" rim | 570–700 g / 1.25–1.5 lb |
| Serving bowl | 10" rim | 1.1–1.4 kg / 2.5–3 lb |
| Side plate | 8" | 700–900 g / 1.5–2 lb |
| Dinner plate | 10" | 1–1.3 kg / 2.25–3 lb |
| Bud vase | 5" tall | 350–500 g / 0.75–1.1 lb |
| Vase | 10" tall | 900 g–1.2 kg / 2–2.6 lb |
| Planter | 6" rim | 900 g–1.2 kg / 2–2.6 lb |
A 12 oz mug is usually thrown from 1 to 1.25 lb (450–570 g), plus 2–4 oz for a pulled handle. Thin-walled porcelain mugs can come in nearer 400 g. Hand-built mugs need about 25–35% more clay.
Treat the pot as walls plus a floor: multiply that surface area by your wall thickness, then by roughly 1.9 g/cm³ for moist stoneware, and add 10–15% for trimming or hand-building waste.
Yes — slab, coil, and pinch construction usually needs 20–40% more clay than wheel throwing because of seams, overlaps, attachments, and the clay left in joins. The calculator applies a 25% hand-building factor by default.
Yes — drying and firing take off about 12–18% of the weight, so record both the wet-clay weight and the finished weight if you sell by size.
ClayCal stores clay body, forming method, weight, dimensions, firing and glaze for each piece — and schedules the make day by day from your due date.