Power-Voltage-Current Calculator

Calculate electrical power (watts), voltage (volts), or current (amps) by entering any two values. The third value will be automatically calculated using the formula: P = V × I

P (Watts) = V (Volts) × I (Amps)
V
A
W

Quick Fill Common US Values:

Common Specifications:

  • Standard US outlet: 120V, 15A (1800W max)
  • USB charging: 5V, 2.4A (12W typical)
  • Electric dryer: 240V, 30A (7200W max)