Pottery Glaze Mixing Calculator

Scale a dry glaze recipe to fill a bucket at a target specific gravity, with the water and the material breakdown.

Weight the recipe is written for g

The base weight of the recipe, which is usually 100 grams. Every material is scaled from this figure.

Bucket size to mix litres

The volume of glaze in the bucket, not the bucket capacity. Leave room for freeboard if the bucket is used for dipping.

Target specific gravity

A dipping glaze is usually mixed to about 1.4 to 1.5, which is 1400 to 1500 grams per litre.

Slurry from 100 g of dry glaze ml

Most dry glazes make roughly 100 to 120 millilitres of slurry from 100 grams at a working consistency.

Material 1 as a percentage of the recipe total %

Enter the largest material first, which is usually the feldspar or the silica.

Material 2 as a percentage %

A second material, such as whiting or kaolin.

Material 3 as a percentage %

A third material, such as a frit or a clay.

Material 4 as a percentage %

A fourth material, such as an oxide or a colourant.

Price of the dry glaze per kilogram

Optional. Used for the cost of one bucket.

Surface to be glazed from this bucket sq m

Used for the cost and material per square metre.

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Free calculator by Handcraft worked examples and methodology No account, nothing stored.