Enter your inductors' values into Inductor 1, Inductor 2, and up to two optional fields (Inductor 3, Inductor 4), choose each unit, and this Inductors in Parallel Calculator gives you the Total Parallel Inductance — plus the converted result in henries (H).
Total Parallel Inductance
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Total Inductance (H)
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For parallel inductors, use the reciprocal formula: 1/Lt = 1/L1 + 1/L2 + 1/L3 + ... where Lt is the total inductance. The total inductance is always less than the smallest individual inductor value.
When two inductors are connected in parallel, the total inductance decreases. The equivalent inductance is calculated as Lt = (L1 × L2)/(L1 + L2), which is always smaller than either individual inductor.
Real inductors have some resistance due to the wire windings, called equivalent series resistance (ESR). However, for inductance calculations, we typically consider only the pure inductance value and ignore resistance.
Three identical 10 mH inductors in parallel would have a total inductance of 10/3 = 3.33 mH. For identical inductors in parallel, divide the individual value by the number of inductors.
Parallel inductors share the magnetic flux, effectively reducing the total inductance. This is opposite to resistors, where parallel resistance is also smaller, but the physical reason relates to magnetic field interaction.
You can use Henry (H), millihenry (mH), microhenry (μH), nanohenry (nH), or picohenry (pH). The calculator automatically converts all values to the same unit before calculating the parallel combination.