Electrical power calculator
Calculate power from voltage and current.
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Your measurements
Enter your project values. Your estimate updates as you type.
View your estimateExample values are a starting point. Check product yields and specifications before ordering.
YOUR ESTIMATE
Electrical power
2,300W
Power2.3 kW
Calculated from your measurements.
How it's calculated
Power (W) = voltage (V) × current (A).
Calculations use consistent units for your selected measurements. Whole purchase quantities are rounded up.
What this estimate includes
Uses P = V × I for DC or a single-phase resistive load at unity power factor. Not for three-phase or reactive load sizing.
Quantity and arithmetic estimates only. Use project specifications for installation and design requirements.
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