Tare
Clay Calculator
cm · g
in · oz
Beginner
Intermediate
Advanced
Cylinder
Bowl
Clay Body
Stoneware
12%
Porcelain
13.5%
Earthenware
9%
Terracotta
7.5%
Raku
11%
B-Mix
11.5%
Bone China
14%
Red Stoneware
8%
Grogged SW
10%
+ Custom
Shrinkage %
from clay bag or data sheet
%
Target Fired Dimensions
what you want after the kiln
Fired Height
7–12 cm typical for mugs
cm
Fired Rim Diameter
outer edge after firing
cm
Wall Thickness
5–8 mm functional ware
mm
Wall is very thin for this height — structural risk. 5–8 mm recommended.
Foot Ring
leave blank to skip
Foot Ring Height
5–20 mm typical
mm
Foot Ring Diameter
defaults to 55% of rim
cm
Foot Ring Wall
4–5 mm after trimming
mm
Vessel Preset
Mug
Rice Bowl
Soup Bowl
Ramen Bowl
Salad Bowl
Cereal Bowl
Dessert Bowl
Espresso
Tea Cup
Target Fired Dimensions
what you want after the kiln
Fired Volume
300–400 ml typical
ml
Fired Height
rim diameter derives from volume + height
cm
Wall Thickness
5–7 mm for bowls
mm
Foot Ring
adds clay to calculation
Foot Ring Height
5–20 mm typical
mm
Foot Ring Size —
55% of belly
40% wide
55% traditional
70% narrow
Foot Ring Wall
4–5 mm after trimming
mm
Clay to Wedge
—
Enter fired dimensions to calculate
Green — Throw To
Height
—
Diameter
—
Belly Ø
—
Foot Ring Ø
—
Fired — Your Target
Height
—
Diameter
—
Belly Ø
—
Foot Ring Ø
—
Volume (fired)
—
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Ask Tare
Is this weight realistic?
Explain the shrinkage calculation
Wall thickness guide
Warping risk for these proportions
Foot ring height guide
Ask