Single-Phase Power Calculator
A comprehensive tool to solve for any variable in the single-phase power formula (Power, Voltage, or Current).
Inputs
Optional: Cost Estimation
Estimated Cost
$0.00
Results
Real Power (kW)
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Apparent Power (kVA)
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Reactive Power (kVAR)
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Understanding Single-Phase Power
Single-phase power is the standard electrical distribution method for residential homes and small businesses in North America (120/240V). It uses two hot wires and a neutral to provide power. Unlike three-phase power, the voltage peaks and dips in a single wave cycle.
Formulas Used:
Real Power (kW) = (V × I × PF) / 1000
Voltage (V) = (kW × 1000) / (I × PF)
Current (I) = (kW × 1000) / (V × PF)
Apparent Power (kVA) = kW / PF
Reactive Power (kVAR) = √(kVA² - kW²)