Cone Offset Calculator

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Instructions

Place a cone pack (guide, target, guard) on each shelf—e.g., cones 5, 6, 7. After firing, measure the bend angle with the Orton Measuring Template.

• If the target cone is overfired (bent past 90°), measure the guard cone.

• If it’s underfired (not bent), measure the guide cone.

• If it’s partially bent (10°–90°), measure the target cone.

Enter the target cone, measured cone, and angle into the calculator.

Use the result as a Cone Offset in your controller, or adjust the peak temp manually.

For uneven zones, use that zone’s cone reading to set a Thermocouple Offset.

Note: Thermocouple Offsets are reversed—positive = less heatwork, negative = more heatwork.