Kiln Firing Temperatures & Cone Equivalents

The cone range listed on the clay package is the range at which your clay vitrifies. Ceramic cones melt progressively with increasing heat and duration, indicating heat work.

Note that the word “cone” is often replaced with this symbol: △

All temperature equivalents on this chart are based on a 270°F (150°C) per-hour rate climb using the large cone. Rates of climb change per firing, as do temperature equivalents.