Ohm Calculator for Speakers in Parallel

This calculator determines the total effective resistance of any number of speakers in parallel.

Enter the resistance or impedance values separated by commas. Units are Ohms.

arrow Ohm Calculator for Speakers in Series

Parallel Resistance Formula

Rtotal = (1/R1 + 1/R2 + 1/R3 +…. + 1/Rn)-1

Example Calculation

Consider four speakers in parallel with the following resistance values: 1 Ω, 6 Ω, 15 Ω and 100 Ω. The total effective resistance is 0.80 Ω.

If you have two resistors – one large and the other small in parallel, the effective resistance is closer to the smaller value. Take for instance 1 Ω and 100 Ω in parallel. The effective resistance is 0.99 ≈ 1 Ω.