AC Single Phase Tool

Single Phase Watts to Amps Calculator

Calculate amps for single-phase AC circuits. The formula is I = P / (V x PF), where PF is power factor (0 to 1). Required for motors, HVAC, and household AC loads where PF matters.

Conversion direction

Electrical system

PowerWVoltageV

Quick voltage presets

Calculated result1000 W · 120 V · DC

8.333 A

Formula usedI = P / V

Custom voltage is always supported.

Formulas Used

DCI = P / V

No power factor needed for DC circuits.

AC 1φI = P / (V × PF)

Single-phase AC — multiply voltage by power factor.

AC 3φI = P / (√3 × V × PF)

Three-phase AC — divide by √3 ≈ 1.732.

Frequently Asked Questions

What is the single-phase watts to amps formula?

I = P / (V x PF). For 1200W at 120V with PF 0.9: I = 1200 / (120 x 0.9) = 11.11 A.

When should I use single-phase vs DC formula?

Use single-phase AC for motors, HVAC, and household circuits. Use DC formula for batteries, solar panels, and electronics.