Three Phase Current
Use the Three Phase Current. Enter Power (watts) and Line voltage (volts) for a clear result, formula explanation, and practical planning checks.
Three Phase Current measurements
Enter your values, then calculate.
Result
How to calculate three phase current
This calculator finds three-phase current from power and line voltage.
How the calculation works
Current = Power ÷ (√3 × Line voltage).
Example
30,000 watts at 480V line voltage: 30,000÷(1.732×480) = 30,000÷831.4 ≈ 36.1A.
Frequently asked questions
How is Result calculated?
Result = [Power] ÷ (sqrt(3) × [Line voltage]).
Is the Three Phase Current free to use?
Yes — every calculator on Simple Calculator Tools is free, runs in your browser, and does not require an account.
Three Phase Current
Current = Power ÷ (√3 × Line voltage).
Let's understand your three phase current 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 Current
- This assumes a balanced load and unity power factor — for a load with a different power factor, divide by power factor as well for accurate current.
- The √3 (approximately 1.732) factor accounts for the phase relationship between conductors in a three-phase system, distinguishing this from single-phase current calculations.
Common Three Phase Current Mistakes to Avoid
- Using the single-phase current formula (power ÷ voltage) for a three-phase circuit, which would significantly overstate the actual current since it misses the √3 factor.
When to Use This Calculator
This calculator finds three-phase current from power and line voltage.