Electrical Power Calculator
Calculate electrical power using P=VI, P=I^2R, P=V^2/R formulas. Also calculate electricity cost from wattage and usage hours.
Enter values to calculate electrical power.
Power Formulas
P = V x I (watts). Also: P = I^2 x R, P = V^2 / R. For cost: kWh = (Watts x Hours) / 1000. Cost = kWh x rate.
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