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100 amps to watts
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12,000 W
100 amps at 120 V · 24,000 W at 240 V
100 amps to watts by voltage
| Voltage | Watts | kW |
|---|---|---|
| 12 V DC | 1,200 W | 1.20 kW |
| 24 V DC | 2,400 W | 2.40 kW |
| 120 V | 12,000 W | 12.00 kW |
| 208 V | 20,800 W | 20.80 kW |
| 230 V | 23,000 W | 23.00 kW |
| 240 V | 24,000 W | 24.00 kW |
| 208 V three-phase (PF 0.9) | 32,423 W | 32.42 kW |
| 480 V three-phase (PF 0.9) | 74,822 W | 74.82 kW |
Single-phase: W = A × V (power factor 1). Three-phase: W = √3 × A × V × PF; motors and electronics have PF below 1.
FAQ
How many watts is 100 amps?
100 A × 120 V = 12,000 W; at 240 V it is 24,000 W. Watts = amps × volts for resistive single-phase loads.
What breaker do I need for a 100 amp load?
For a continuous load (3+ hours) the NEC sizes the breaker at 125%: 125 A → next standard size 125 A. Check local code.
Wire size for a 125 A circuit · Ohm’s law calculator · All amps to watts
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