Three-Phase Power Calculator
Use the Three-Phase Power Calculator. Enter Line voltage (V) and Line current (A) for a clear result, formula explanation, and practical planning checks.
Three-Phase Power measurements
Enter your values, then calculate.
Result
How to calculate three-phase power
This calculator finds three-phase real power from line voltage, line current, and power factor — the standard formula for balanced three-phase electrical systems.
How the calculation works
Power = √3 × Line voltage × Line current × Power factor.
Example
480V, 40A, 0.9 power factor: 1.732×480×40×0.9 ≈ 29,923 watts (about 29.9 kW).
Frequently asked questions
How is Result calculated?
Result = sqrt(3) × [Line voltage] × [Line current] × [Power factor].
Is the Three-Phase Power Calculator free to use?
Yes — every calculator on Simple Calculator Tools is free, runs in your browser, and does not require an account.
Three-Phase Power Calculator
Power = √3 × Line voltage × Line current × Power factor.
Let's understand your three-phase power result.
Calculate a result above and this guide will help you interpret it using this calculator's own formula and explanation.
Pro Tips for Three-Phase Power
- This assumes a balanced load (equal current on all three phases) — an unbalanced load requires phase-by-phase calculation instead.
- Power factor for industrial motor loads commonly runs 0.8-0.95 — confirm your equipment's actual rating rather than assuming 1.0.
Common Three-Phase Power Mistakes to Avoid
- Using the single-phase power formula for a three-phase circuit, which would significantly understate actual power by missing the √3 factor.
When to Use This Calculator
This calculator finds three-phase real power from line voltage, line current, and power factor — the standard formula for balanced three-phase electrical systems.