How Many Amps Is 340 kW at 208V?

At 208V, 340 kW pulls approximately 1,110.28 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.

340 kW at 208V, AC three-phase (PF 0.85)

1,110.28 Amps

340 kilowatts at 208V on AC three-phase ≈ 1,110.28 amps

AC Single Phase (PF 0.85)1,923.05 A

DC (ideal baseline)1,634.6 A

Try: 200kW at 208V 150kW at 208V 125kW at 208V 100kW at 208V

Volts

Amps (AC three-phase, PF 0.85)

1,110.28

Formulas

DC: kW to Amps

I_(A) = 1000 × P_(kW) ÷ V_(V)

1000 × 340 ÷ 208 = 339,996 ÷ 208 = 1,634.6 A

AC Single Phase (PF = 0.85)

I_(A) = 1000 × P_(kW) ÷ (PF × V_(V))

339,996 ÷ (0.85 × 208) = 339,996 ÷ 176.8 = 1,923.05 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

339,996 ÷ (1.732 × 0.85 × 208) = 339,996 ÷ 306.22 = 1,110.28 A

Equipment & Circuit Sizing

Energy Cost

340 kW costs $57.80/hour at $0.17/kWh (rates last reviewed April 2026). See breakdown.

Power Factor Reference (AC three-phase)

How the line current for 340 kW at 208V 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	340 kW at 208V (AC three-phase)
Resistive (heaters, incandescent)	1	943.73 A
Fluorescent lamps	0.95	993.4 A
LED lighting	0.9	1,048.59 A
Synchronous motors	0.9	1,048.59 A
Typical mixed loads	0.85	1,110.28 A
Induction motors (full load)	0.8	1,179.67 A
Computers (without PFC)	0.65	1,451.9 A
Induction motors (no load)	0.35	2,696.38 A

AC Conversion Comparison

On DC, 340kW at 208V draws 1,634.6A. AC single-phase at PF 0.85 pulls 1,923.05A because reactive current is added on top of the real power. Three-phase at the same voltage needs only 1,110.28A per line since the same 340kW is shared across three conductors instead of one.

Circuit Type	Formula	Result
DC	339,996 ÷ 208	1,634.6 A
AC Single Phase (PF 0.85)	339,996 ÷ (0.85 × 208)	1,923.05 A
AC Three Phase (PF 0.85)	339,996 ÷ (1.732 × 0.85 × 208)	1,110.28 A

Other kW Values at 208V

kW	AC 3-Phase per line, PF 0.85	AC 1-Phase PF 0.85
15 kW	48.98 A	84.84 A
18 kW	58.78 A	101.81 A
20 kW	65.31 A	113.12 A
22 kW	71.84 A	124.43 A
25 kW	81.64 A	141.4 A
30 kW	97.97 A	169.68 A
35 kW	114.29 A	197.96 A
40 kW	130.62 A	226.24 A
50 kW	163.28 A	282.81 A
60 kW	195.93 A	339.37 A
75 kW	244.92 A	424.21 A
100 kW	326.56 A	565.61 A
125 kW	408.19 A	707.01 A
150 kW	489.83 A	848.42 A
200 kW	653.11 A	1,131.22 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 340 kW at 400V = 577.34A (3-phase) electrical_services 340 kW at 460V = 502.04A (3-phase) electrical_services 340 kW at 480V = 481.12A (3-phase) electrical_services 340 kW at 575V = 401.63A (3-phase)

Related Calculations

bolt 339,996W to amps at 208V payments 339,996W running cost cable Wire size for 1,110.28A at 208V (3Φ)

Frequently Asked Questions

How many amps is 340 kW at 208V?expand_more

340 kW at 208V draws about 1,110.28 amps on an AC three-phase circuit at PF 0.85. Alternate cases at the same voltage: 1,634.6A on DC, 1,923.05A on AC single-phase.

Is 340 kW single-phase or three-phase?expand_more

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

What is the formula for kW to amps?expand_more

DC: Amps = (kW × 1000) ÷ Volts. AC single-phase: Amps = (kW × 1000) ÷ (Volts × PF). AC three-phase: Amps = (kW × 1000) ÷ (Volts_L-L × √3 × PF).

Why do industrial systems use kW instead of watts?expand_more

Industrial equipment operates at higher power levels. 340 kW is easier to express than 339,996W. The math is identical, just scaled by 1000.

How much does 340 kW cost to run?expand_more

340 kW costs $57.80 per hour at $0.17/kWh (US residential average, last reviewed April 2026). At 8 hours/day that is $13,871.84 per month.

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.