An inductors in parallel calculator quickly computes the equivalent inductance of multiple inductors connected side by side across the same nodes. In parallel, inductive reactances combine like resistors in parallel: the reciprocal of the total inductance equals the sum of reciprocals of each branch. This tool saves time for circuit designers sizing filters, chokes, resonant tanks, and power electronics magnetics.

Because parallel inductors raise total current capability and reduce net inductance, they are common in high-current supplies, EMI filters, and RF tuning networks. This calculator outputs total inductance in henries, millihenries, and microhenries, plus optional reactance at any chosen frequency.

1. Enter each inductor value in H, mH, or μH.
2. Use Add/Remove to include up to six parallel inductors.
3. Optional: Enter frequency (Hz) to see total reactance.
4. Click Calculate to get equivalent inductance and reactance.
5. Review outputs in henries, millihenries, and microhenries for design documentation.

• Higher current handling: Splits current across windings to reduce copper losses.
• Lower total inductance: Useful when a single inductor of small value is unavailable.
• Thermal spreading: Heat shared between components improves reliability.
• Availability: Combine standard values to hit non-standard inductance targets.
• EMI filters: Parallel chokes paired with capacitors to shape impedance.

• Match part values: Use similar inductances to balance current sharing.
• DC resistance (DCR): Lower DCR inductors carry more current in parallel branches.
• Core saturation: Ensure each inductor stays below its saturation current.
• Temperature rise: Parallel devices reduce I²R losses in each winding.
• Layout: Keep traces short and symmetric to minimize parasitics at high frequency.

Given: Three inductors in parallel: 4.7 mH, 6.8 mH, 10 mH at 60 Hz.

1. Convert to henries: 0.0047, 0.0068, 0.010 H.
2. Reciprocal sum: 1/0.0047 + 1/0.0068 + 1/0.010 = 212.8 + 147.1 + 100 = 459.9.
3. Total inductance: 1 / 459.9 = 0.00217 H = 2.17 mH.
4. Reactance at 60 Hz: X_L = 2\u03c0 × 60 × 0.00217 = 0.818 \u03a9.