Power Current Voltage Calculator
Estimate power, voltage, or current for DC, simple resistive loads, single-phase AC, or three-phase AC with optional power factor.
Quick answer
Power Current Voltage Calculator is a free online tool that helps you estimate dc or ac power, current and voltage. Estimate power, voltage, or current for DC, simple resistive loads, single-phase AC, or three-phase AC with optional power factor.
Power Current Voltage Calculator FAQ
How does it work?
Select what you want to calculate, choose the circuit model, then enter the known values. DC uses P = V x I, single-phase AC uses P = V x I x PF, and three-phase AC uses P = sqrt(3) x V x I x PF.
What is power factor?
Power factor is the ratio between active power and apparent power in AC circuits. Use 1 for purely resistive loads or when power factor is unknown.
Is this for detailed electrical design?
No. It is a basic calculation for planning and comparison. Real installations may require local code checks and professional review.