Repeatable batches, recorded by weight

Glaze Calculators for Recipes, Batches & Fit

A glaze result is only repeatable when the recipe, batch size, water content, application and firing are recorded together. These calculators handle the arithmetic, but they do not replace a labelled test tile or a safety review of the materials in the recipe.

Use percentage and batch tools for weighing, specific gravity tools for slurry control, and the COE tools as comparative models. Calculated expansion is useful for spotting direction of change; final glaze fit still has to be checked on the intended clay body.

10 working tools

Choose a calculator

01 Glaze Batch Calculator Scale any glaze recipe to a specific batch weight by entering ingredient percentages. 02 Glaze Thermal Expansion (COE) Calculator Calculate the coefficient of thermal expansion (COE) of a glaze from its oxide composition. 03 Glaze Specific Gravity Calculator Measure glaze specific gravity and calculate how much water to add or remove to reach a target SG. 04 Deflocculant Dosage Calculator Calculate starting amounts of sodium silicate or Darvan for deflocculating casting slip. 05 Glaze Colorant Calculator Calculate oxide and stain additions to produce a target color in a glaze batch. 06 Silica:Alumina Ratio Calculator Calculate the SiO₂:Al₂O₃ ratio from a glaze UMF to predict glossy, satin, or matte surface quality. 07 Glaze Recipe Scaler Scale any ceramic recipe — clay body, glaze, slip, or engobe — to any target batch weight. 08 Loss on Ignition (LOI) Calculator Calculate the fired weight of a glaze or clay batch after materials lose mass during firing, and scale batch weights to hit a target fired quantity. 09 Glaze Opacifier Calculator Calculate how much zircopax, tin oxide, or titanium dioxide to add to a base glaze to achieve slight, moderate, or full opacity. 10 Glaze Recipe to Percentage Converter Convert a glaze recipe written in grams or parts by weight into percentages normalised to 100. Enter up to 12 ingredients and get a percentage breakdown instantly.