Free Ceramic Calculators — 50+ Tools for Potters & Engineers
Scientifically accurate ceramic tools covering every stage of the making process — from calculating clay shrinkage and sizing wet pieces, to glaze batch scaling, kiln firing schedules, and studio business math. All calculators are free, run in the browser, and require no account.
Glaze Engineering
Glaze Batch Calculator
Scale any glaze recipe to a specific batch weight by entering ingredient percentages.
Glaze Thermal Expansion (COE) Calculator
Calculate the coefficient of thermal expansion (COE) of a glaze from its oxide composition.
Glaze Specific Gravity Calculator
Measure glaze specific gravity and calculate how much water to add or remove to reach a target SG.
Deflocculant Dosage Calculator
Calculate starting amounts of sodium silicate or Darvan for deflocculating casting slip.
Glaze Colorant Calculator
Calculate oxide and stain additions to produce a target color in a glaze batch.
Silica:Alumina Ratio Calculator
Calculate the SiO₂:Al₂O₃ ratio from a glaze UMF to predict glossy, satin, or matte surface quality.
Glaze Recipe Scaler
Scale any ceramic recipe — clay body, glaze, slip, or engobe — to any target batch weight.
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.
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.
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.