Series Inductance

The total inductance of n inductors in series equals the sum of each inductance.

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

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

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

etc.

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