Formulas, Conversions & Calculations

Convert from inches or millimeters to AWG

Showing approximate amperes necessary to produce a given temperature. Applying only to straight wires stretched horizontally in free air.

To make the basic calculations for the design of heating elements, the following formulas, known as Ohm’s Law, are essential.

This data has been compiled as an aid to the manufacturers of helical coils and show the approximate current in amperes required to heat the coils in the open air to the indicated temperatures under the conditions specified.

Ohms per inch of closed helix

This table displays the size and approximate cold resistances of various alloys for common wattages.