I = P / VNo power factor needed for DC circuits.
Primary Conversion Tool
Watts to Amps Calculator
Convert electrical power in watts into current in amps. Choose DC, single-phase AC, or three-phase AC, enter voltage and power factor when needed, and get an instant result.
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.
1000 Watts to Amps — Conversion Table
Results at common voltages. AC values use power factor = 0.9.
| Voltage | DC (I = P/V) | AC 1φ (PF 0.9) | AC 3φ (PF 0.9) |
|---|---|---|---|
| 12 V | 83.3333 A | 92.5926 A | 53.4584 A |
| 24 V | 41.6667 A | 46.2963 A | 26.7292 A |
| 48 V | 20.8333 A | 23.1481 A | 13.3646 A |
| 120 V | 8.3333 A | 9.2593 A | 5.3458 A |
| 240 V | 4.1667 A | 4.6296 A | 2.6729 A |
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.
How to Convert Watts to Amps
For DC or resistive loads, use I = P / V. AC loads also require power factor, and balanced three-phase systems use the square root of three.
Watts to Amps Examples
A 1,200 W load at 120 V draws 10 A on DC or a resistive circuit. At power factor 0.8, the same single-phase AC load draws 12.5 A.
Frequently Asked Questions
How many amps is 1,000 watts at 120 volts?
For DC or a resistive load, 1,000 W / 120 V = 8.33 A. An AC load requires its power factor.
What information is needed to convert watts to amps?
You need watts and voltage. AC calculations also need the power factor and whether the circuit is single-phase or three-phase.