Parallel Inductance

The reciprocal of the total inductance of n inductors in parallel equals the sum of the reciprocals of each inductor.

frac{1}{L_{total}}=frac{1}{L_{1}}+frac{1}{L_{2}}+frac{1}{L_{n}}

frac{1}{L_{1}}=frac{1}{L_{total}}-frac{1}{L_{2}}-frac{1}{L_{n}}

frac{1}{L_{2}}=frac{1}{L_{total}}-frac{1}{L_{1}}-frac{1}{L_{n}}

etc.

More info: http://en.wikipedia.org/wiki/Series_and_parallel_circuits#Inductors_2