Ohm's Law Calculator

Calculate voltage, current, resistance, and power using Ohm's Law and the power equation. Enter any two values to solve for the rest.

Ohm's Law Solver

Enter any two known values and leave the others blank. The remaining values will be calculated automatically.

Voltage (V)

Current (I)

Resistance (R)

Power (P)

Enter any two values to calculate.

Voltage

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Current

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Resistance

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Power

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Calculate the total impedance of speakers wired in series or parallel.

Speaker Impedance

Number of Speakers

Wiring

Series Parallel

Total Impedance

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Current Draw (at V)

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Uses voltage from solver above

Total Power

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Common amplifier and speaker impedance combinations.

Amp Voltage	Load (Ω)	Current (A)	Power (W)