Studio tools
Small calculators for big decisions: what a firing costs, whether your circuit can take a kiln, how much your clay shrinks and what a cone really means.
Kiln firing cost calculatorEstimate what a kiln firing costs from kiln kW, firing hours and duty cycle, using EIA average residential electricity rates for your state.Can I plug in my kiln? Outlet checkerCheck a kiln’s amps or watts against a 15, 20, 30, 40 or 50 A circuit using the 80% continuous-load rule, and see the smallest breaker it needs.Clay shrinkage calculatorConvert between wet and fired size by your clay’s shrinkage percentage, find the right scale-up factor, and measure your own clay with a test bar.Orton cone temperature chartOrton self-supporting cone temperatures for cones 022 to 10 at slow, medium and fast heating rates, in °F and °C, with what each range is used for.Home studio checklist by stageAn interactive home pottery studio checklist in four stages: no-kiln start, first wheel, home kiln and small business, with links to compare each item.