I = P / VNo power factor needed for DC circuits.
Reference Table
Watts to Amps Conversion Chart
Quick-reference conversion table for watts to amps at the most common voltages. All DC values use I = P/V. AC values use PF = 0.9. For custom values, use the calculator above.
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.
Frequently Asked Questions
How do I read the watts to amps chart?
Find your wattage in the left column, then read across to your circuit voltage. DC values use the exact formula I = P/V. AC values include a 0.9 power factor — your actual value may differ.
Why are AC amps higher than DC amps for the same watts?
AC circuits with a power factor below 1.0 require more current to deliver the same real power. At PF 0.9, the AC current is about 11% higher than the DC equivalent.