Inductors Series/Parallel Calculator
Calculate total inductance for series or parallel inductors.
This tool is for informational and educational purposes only. It is not a substitute for professional financial, medical, legal, or engineering advice. See Terms of Service.
Can't find what you need?
Request a ToolHow to Use the Inductors Series/Parallel Calculator
Select series or parallel, then enter up to five inductance values in henries. Leave unused fields blank. The calculator shows the total equivalent inductance instantly.
About Inductors Series/Parallel
When inductors are connected together, their combined inductance depends on the configuration. In series, inductances add directly (like resistors in series). In parallel, the reciprocals add (like resistors in parallel). These calculations assume no mutual inductance (magnetic coupling) between inductors. Understanding series and parallel inductance is essential for filter design, power electronics, and RF circuit design.
Frequently Asked Questions
How do inductors combine in series?
In series, inductances add directly: Lt = L1 + L2 + ... (assuming no mutual inductance). The total inductance is always greater than the largest individual inductor.
How do inductors combine in parallel?
In parallel, the reciprocals add: 1/Lt = 1/L1 + 1/L2 + ... The total inductance is always less than the smallest individual inductor.
What is mutual inductance?
Mutual inductance occurs when the magnetic field of one inductor links to another. In series with mutual coupling, the total inductance also depends on the mutual inductance and relative winding direction.