Electrical Calculator
3 Phase Power Calculator
Calculate three-phase electrical power using voltage, current, and power factor.
What this calculator does
This calculator estimates three-phase electrical power using line voltage, current, and power factor in a balanced system.
It is useful for quick checks involving motors, industrial loads, panels, and other three-phase equipment where a simple power estimate is needed.
Inputs
Result
How to read the result
The result shows estimated real power for a balanced three-phase load using the values you entered. The watt value is the raw result, and the kilowatt value is the same result converted for easier practical use.
This estimate is most useful for quick load checks and rough comparisons, not for final equipment selection or protection design.
Formula
Power (W) = √3 × Voltage (V) × Current (A) × Power Factor
Power (kW) = Power (W) ÷ 1000
Example
If line voltage is 380V, current is 10A, and power factor is 0.9:
√3 × 380 × 10 × 0.9 ≈ 5922.28 W
5922.28 W ÷ 1000 ≈ 5.9223 kW
Important notes
This is a balanced three-phase estimate
This calculator assumes a balanced three-phase system. Unbalanced loads may require different analysis.
This page uses line voltage input
The formula here is based on standard three-phase power calculation using line voltage and line current.
This is not a full system study
Use this for quick estimation only. Final design work may require load analysis, protection review, efficiency assumptions, and equipment data.
FAQ
What is the √3 factor for?
In a balanced three-phase system, √3 is part of the relationship between line voltage and total real power.
Is this calculator for balanced loads?
Yes. This is a simple balanced three-phase power estimate.
Can I use line-to-line voltage here?
Yes. This page assumes line voltage input in a standard three-phase calculation.
Why can actual measured power differ from this result?
Real systems may differ because of imbalance, load variation, measurement conditions, harmonics, and equipment characteristics.