Glaze

Glaze Batch Calculator

Scale any glaze recipe to a specific batch weight by entering ingredient percentages.

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Recipe Ingredients

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Results

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Enter your measurements above and click Calculate.

Formula Explanation

A glaze recipe is expressed in parts by weight, typically normalized to 100%. To make a batch, multiply each material's percentage by the target batch weight.

Material Weight = Percentage × (Batch Size ÷ 100)

Frequently Asked Questions

What is LOI and should I compensate for it? expand_more
Loss on Ignition (LOI) is the percentage weight a material loses when fired, usually from CO₂ off-gassing or water loss. For precision batch mixing, LOI compensation ensures the correct ratio of oxides in the final glaze.
What is a good batch size for testing? expand_more
A 100g test batch is enough to glaze 2–3 test tiles. Use a 0.01g precision balance for test batches. For production, 1000g–2000g is a typical single-session batch.
Can I use this for slip recipes? expand_more
Yes. The batch calculator works for any recipe expressed in percentage weights, including slips, engobes, and terra sig.
What are colorant "additions"? expand_more
Colorants (oxides and stains) are often listed as additions — they are added as a percentage of the base glaze weight, not included in the base 100%. For example, "4% cobalt" on a 1000g batch = 40g cobalt in addition to the 1000g base.