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Electrical Power Calculator
Calculate electrical power, current, and resistance from voltage using standard electrical formulas.
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What This Calculates
This tool calculates electrical power from voltage and current, plus the implied resistance, using two of the most fundamental relationships in electrical engineering.
The Formulas
Power: P = V × I (watts). Resistance (Ohm’s Law): R = V / I (ohms). Daily energy use is estimated by multiplying power by 24 hours and converting to kilowatt-hours.
For general educational and planning purposes; always follow proper safety practices when working with real electrical circuits.
Last reviewed August 2026