How Many Amps Is 372 kW at 400V?

At 400V, 372 kW pulls approximately 631.69 amps on AC three-phase (PF 0.85). This is the case typical for commercial HVAC, industrial motors, rooftop units, and three-phase panel loads. Always verify against the equipment nameplate for actual install sizing.

372 kW at 400V, AC three-phase (PF 0.85)

631.69 Amps

372 kilowatts at 400V on AC three-phase ≈ 631.69 amps

AC Single Phase (PF 0.85)1,094.12 A

DC (ideal baseline)930 A

Try: 200kW at 400V 150kW at 400V 125kW at 400V 100kW at 400V

Volts

Amps (AC three-phase, PF 0.85)

631.69

Formulas

DC: kW to Amps

I_(A) = 1000 × P_(kW) ÷ V_(V)

1000 × 372 ÷ 400 = 372,000 ÷ 400 = 930 A

AC Single Phase (PF = 0.85)

I_(A) = 1000 × P_(kW) ÷ (PF × V_(V))

372,000 ÷ (0.85 × 400) = 372,000 ÷ 340 = 1,094.12 A

AC Three Phase (PF = 0.85)

I_(A) = 1000 × P_(kW) ÷ (√3 × PF × V_L-L), where V_L-L is the line-to-line voltage

372,000 ÷ (1.732 × 0.85 × 400) = 372,000 ÷ 588.88 = 631.69 A

Equipment & Circuit Sizing

Energy Cost

372 kW costs $63.24/hour at $0.17/kWh (rates last reviewed April 2026). See breakdown.

Power Factor Reference (AC three-phase)

How the line current for 372 kW at 400V changes with load power factor, on the same AC three-phase circuit basis the rest of the page uses. DC has no power factor; PF 1.0 represents resistive AC loads.

Load Type	PF	372 kW at 400V (AC three-phase)
Resistive (heaters, incandescent)	1	536.94 A
Fluorescent lamps	0.95	565.2 A
LED lighting	0.9	596.6 A
Synchronous motors	0.9	596.6 A
Typical mixed loads	0.85	631.69 A
Induction motors (full load)	0.8	671.17 A
Computers (without PFC)	0.65	826.06 A
Induction motors (no load)	0.35	1,534.1 A

AC Conversion Comparison

On DC, 372kW at 400V draws 930A. AC single-phase at PF 0.85 pulls 1,094.12A because reactive current is added on top of the real power. Three-phase at the same voltage needs only 631.69A per line since the same 372kW is shared across three conductors instead of one.

Circuit Type	Formula	Result
DC	372,000 ÷ 400	930 A
AC Single Phase (PF 0.85)	372,000 ÷ (0.85 × 400)	1,094.12 A
AC Three Phase (PF 0.85)	372,000 ÷ (1.732 × 0.85 × 400)	631.69 A

Other kW Values at 400V

kW	AC 3-Phase per line, PF 0.85	AC 1-Phase PF 0.85
15 kW	25.47 A	44.12 A
18 kW	30.57 A	52.94 A
20 kW	33.96 A	58.82 A
22 kW	37.36 A	64.71 A
25 kW	42.45 A	73.53 A
30 kW	50.94 A	88.24 A
35 kW	59.43 A	102.94 A
40 kW	67.92 A	117.65 A
50 kW	84.9 A	147.06 A
60 kW	101.89 A	176.47 A
75 kW	127.36 A	220.59 A
100 kW	169.81 A	294.12 A
125 kW	212.26 A	367.65 A
150 kW	254.71 A	441.18 A
200 kW	339.62 A	588.24 A

Same kW, Other Voltages

Each destination page leads with the interpretation most common for that voltage, so the amps shown below use the same basis as the page you'd land on: single-phase for residential voltages, three-phase for commercial/industrial panel voltages, DC for low-voltage.

electrical_services 372 kW at 208V = 1,214.79A (3-phase) electrical_services 372 kW at 460V = 549.29A (3-phase) electrical_services 372 kW at 480V = 526.41A (3-phase) electrical_services 372 kW at 575V = 439.44A (3-phase)

Related Calculations

bolt 372,000W to amps at 400V payments 372,000W running cost cable Wire size for 631.69A at 400V (3Φ)

Frequently Asked Questions

How many amps is 372 kW at 400V?expand_more

372 kW at 400V draws about 631.69 amps on an AC three-phase circuit at PF 0.85. Alternate cases at the same voltage: 930A on DC, 1,094.12A on AC single-phase.

What size breaker would I need for 372 kW at 400V?expand_more

This is a sizing question, not a conversion question, and there is no single correct answer from a page like this. Breaker selection depends on the equipment nameplate FLA, whether the load is continuous (NEC 210.19(A) applies the 125% continuous-load rule), the conductor ampacity and temperature rating, any NEC 430/440 motor or HVAC provisions, and local code interpretation. Use the nameplate and a licensed electrician for the real install value; use this page only for the current-draw estimate that feeds into that process.

How many amps does a 372 kW EV charger draw at 400V?expand_more

400V is commercial/industrial panel voltage, not a typical AC EVSE feed to a vehicle. On three-phase 400V, 372 kW works out to about 631.69A per line (three-phase at PF 0.85). In practice, 400-480V three-phase is usually the AC input to a DC fast charger (50-350 kW CCS/NACS stations like Tesla Superchargers), which rectifies to DC and delivers that directly to the vehicle, rather than an AC EVSE connector. A 372 kW figure at 400V is most likely the AC feed to a smaller commercial cabinet or the control-side input of a larger DC fast charger, not an at-the-car AC current.

How much does 372 kW cost to run?expand_more

372 kW costs $63.24 per hour at $0.17/kWh (US residential average, last reviewed April 2026). At 8 hours/day that is $15,177.60 per month.

Is 372 kW single-phase or three-phase?expand_more

372 kW is typically three-phase in commercial and industrial settings.

This calculator provides estimates for reference purposes only. Always consult a licensed electrician and verify compliance with the National Electrical Code (NEC) and local electrical codes before performing any electrical work.