How do I convert an Amp-Turn rating to Gauss?
In the cgs system, one Gauss (B) is equal to one Oersted (H) in air. For coils longer than 5 times their mean diameter, the formula to convert Amp-Turns to Gauss is
B = H = (0.4 * pi * N * I) / coil length
where N = number of turns in the coil, I is the current in Amperes and coil length is in centimeters. As a close approximation, 2 Amp-Turns per inch of coil length develops one Oersted of magnetizing force, or a one Gauss field density, in an air core coil.
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