I = P / VNo power factor needed for DC circuits.
Alternating Current Tool
AC Power Calculator
Calculate real AC power or current for single-phase and three-phase systems using voltage, current, and power factor.
Conversion direction
Quick voltage presets
Power factor varies by load. Use the equipment value when available.
Calculated result1000 W · 120 V · DC
8.333 A
Formula used
I = P / VCustom voltage is always supported.
Formulas Used
I = P / (V × PF)Single-phase AC — multiply voltage by power factor.
I = P / (√3 × V × PF)Three-phase AC — divide by √3 ≈ 1.732.
Single-phase real power is P = V x I x PF. Balanced three-phase real power is P = sqrt(3) x V x I x PF.
Single-phase real power is P = V x I x PF. Balanced three-phase real power is P = sqrt(3) x V x I x PF.
AC power examples
AC power examples. Use the displayed calculator for a numerical result and check the equipment voltage and power factor before applying it.
Frequently Asked Questions
Which formula should I use?
Single-phase real power is P = V x I x PF. Balanced three-phase real power is P = sqrt(3) x V x I x PF.
Can I use this result for equipment sizing?
Use the result as an estimate and verify equipment specifications, code requirements, and manufacturer data before sizing electrical equipment.