Three-Phase Current Calculator
Estimate three-phase line current from real power, line-to-line voltage, power factor and efficiency. This is useful for quick equipment loading and preliminary electrical calculations.
Line current140.7 A
Apparent power111.11 kVA
For preliminary AC calculations. Final equipment and conductor sizing must follow applicable codes, standards, nameplate data and project requirements.
How this tool works
I = P ÷ (√3 × V × PF × η), with P in watts and V as line-to-line voltage.
Example
A 100 kW three-phase load at 480 V, 0.90 power factor and 95% efficiency draws about 140.7 A.
Common questions
Should I use line-to-line voltage?
Yes. For this three-phase formula, enter the line-to-line system voltage.
Is this a code sizing tool?
No. Final conductor and equipment sizing should follow applicable codes, standards and project requirements.