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Electrical Power Calculator

Enter voltage and current to calculate power and resistance.

01 / INPUTS

V
A

02 / RESULT

ELECTRICAL POWER

24 W

Power
24 W
Resistance
6 Ω

Calculation trace

  1. 12 V × 2 A = 24 W
    24 W
    Power
  2. 12 V ÷ 2 A = 6 Ω
    6 Ω
    Resistance
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How it works

Electric power in a DC circuit is P = V·I — voltage in volts times current in amperes gives power in watts.

Assumptions & limits

  • Uses DC or RMS values; does not model power factor or reactive power in AC circuits.
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FAQ

What units does this use?
Volts (V), amperes (A) and watts (W) — the SI units for voltage, current and power.
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