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.
Firing Tools
Kiln Firing Cost Calculator
Estimate the electricity cost of a kiln firing based on wattage, duration, and local electricity rates.
Kiln Volume Calculator
Calculate the internal volume of a round or rectangular kiln to estimate load capacity.
Kiln Ramp Rate Calculator
Calculate total firing time and check ramp rates against critical temperature danger zones.
Pottery Cone Chart & Temperature Calculator
Convert Orton cone numbers to equivalent temperatures in Celsius and Fahrenheit. Free pottery cone chart with firing speed correction.
Firing Schedule Generator
Generate a complete multi-segment kiln firing schedule for bisque or glaze firing.
Kiln Element Calculator
Calculate kiln element resistance, current draw, and estimated element lifespan.
Kiln Cooling Rate Calculator
Calculate safe kiln cooling rates for each temperature zone, with critical guidance for the quartz inversion at 573°C to prevent dunting and thermal shock.
Kiln Loading Calculator
Calculate how many pieces fit on each shelf and in the total kiln based on kiln interior dimensions, shelf height, and piece size.