Glaze

Glaze Batch Calculator

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

Reviewed by ClayCalc Editorial · Updated

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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)

Method & review note

About this calculation

Performs recipe and slurry arithmetic. A calculated percentage or expansion estimate cannot establish glaze durability, fit, toxicity, or food-contact suitability.

Reference: Digitalfire — Ceramic Glaze. 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.

Read the Glaze Testing Workflow

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.