I = P / VNo power factor needed for DC circuits.
DC Circuit Tool
DC Watts to Amps Calculator
Calculate amps from watts for any DC circuit. The DC formula is simply I = P / V — no power factor required. Used for battery systems, solar panels, electronics, and automotive wiring.
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.
DC Watts to Amps Formula
For direct current (DC): I = P / V. Where I is current in amps, P is power in watts, and V is voltage in volts. Unlike AC, DC has no reactive power or power factor — the relationship is exact.
Common DC Voltages
12V (automotive, solar, marine) · 24V (industrial, solar) · 48V (solar, telecom, high-efficiency systems) · 5V (USB) · 3.3V / 1.8V (microelectronics). Select your system voltage in the calculator above.
Frequently Asked Questions
Does DC use power factor?
No. DC circuits have no reactive power, so power factor is always 1. The formula is simply Amps = Watts / Volts.
What is 100 watts at 12V DC?
100 / 12 = 8.333 A.
What is 500 watts at 24V DC?
500 / 24 = 20.833 A.
What is 1000 watts at 48V DC?
1000 / 48 = 20.833 A.