How Many Amps Is 7.2 kW at 575V?

7.2 kilowatts at 575V works out to roughly 8.51 amps on AC three-phase at PF 0.85. That is typical for commercial HVAC, industrial motors, rooftop units, and three-phase panel loads. See the DC and alternate-phase numbers below for other circuit types.

7.2 kW at 575V, AC three-phase (PF 0.85)

8.51 Amps

7.2 kilowatts at 575V on AC three-phase ≈ 8.51 amps

AC Single Phase (PF 0.85)14.73 A

DC (ideal baseline)12.52 A

Try: 7.5kW at 575V 8kW at 575V 6kW at 575V 5kW at 575V

Volts

Amps (AC three-phase, PF 0.85)

8.51

Formulas

DC: kW to Amps

I_(A) = 1000 × P_(kW) ÷ V_(V)

1000 × 7.2 ÷ 575 = 7,200 ÷ 575 = 12.52 A

AC Single Phase (PF = 0.85)

I_(A) = 1000 × P_(kW) ÷ (PF × V_(V))

7,200 ÷ (0.85 × 575) = 7,200 ÷ 488.75 = 14.73 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

7,200 ÷ (1.732 × 0.85 × 575) = 7,200 ÷ 846.52 = 8.51 A

Equipment & Circuit Sizing

Breaker Sizing

Breaker ratings are in amps, not watts, so the real install answer depends on the equipment nameplate FLA, whether the load is continuous (NEC 210.19(A) sizes the conductor and OCP at 125% of a continuous load, equivalently 80% of breaker rating), conductor ampacity and temperature rating, ambient and bundling derates, and any motor or HVAC provisions (NEC 430 / 440). At roughly 8.51A on AC three-phase at 575V, the load sits in the bracket between a 15A standard size (non-continuous) and the next size up that covers a continuous load under 210.19(A). The actual install pick depends on whether the load is continuous and the factors above; a conversion page can't pick a single "right" breaker from the amp draw alone.

Energy Cost

7.2 kW costs $1.22/hour at $0.17/kWh (rates last reviewed April 2026). See breakdown.

Power Factor Reference (AC three-phase)

How the line current for 7.2 kW at 575V 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	7.2 kW at 575V (AC three-phase)
Resistive (heaters, incandescent)	1	7.23 A
Fluorescent lamps	0.95	7.61 A
LED lighting	0.9	8.03 A
Synchronous motors	0.9	8.03 A
Typical mixed loads	0.85	8.51 A
Induction motors (full load)	0.8	9.04 A
Computers (without PFC)	0.65	11.12 A
Induction motors (no load)	0.35	20.66 A

AC Conversion Comparison

On DC, 7.2kW at 575V draws 12.52A. AC single-phase at PF 0.85 pulls 14.73A because reactive current is added on top of the real power. Three-phase at the same voltage needs only 8.51A per line since the same 7.2kW is shared across three conductors instead of one.

Circuit Type	Formula	Result
DC	7,200 ÷ 575	12.52 A
AC Single Phase (PF 0.85)	7,200 ÷ (0.85 × 575)	14.73 A
AC Three Phase (PF 0.85)	7,200 ÷ (1.732 × 0.85 × 575)	8.51 A

Other kW Values at 575V

kW	AC 3-Phase per line, PF 0.85	AC 1-Phase PF 0.85
0.5 kW	0.5906 A	1.02 A
0.75 kW	0.886 A	1.53 A
1 kW	1.18 A	2.05 A
1.5 kW	1.77 A	3.07 A
2 kW	2.36 A	4.09 A
2.5 kW	2.95 A	5.12 A
3 kW	3.54 A	6.14 A
3.5 kW	4.13 A	7.16 A
4 kW	4.73 A	8.18 A
5 kW	5.91 A	10.23 A
6 kW	7.09 A	12.28 A
7.5 kW	8.86 A	15.35 A
8 kW	9.45 A	16.37 A
10 kW	11.81 A	20.46 A
12 kW	14.18 A	24.55 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.

Related Calculations

bolt 7,200W to amps at 575V payments 7,200W running cost cable Wire size for 8.51A at 575V (3Φ)

Frequently Asked Questions

How many amps is 7.2 kW at 575V?expand_more

7.2 kW at 575V draws about 8.51 amps on an AC three-phase circuit at PF 0.85. Alternate cases at the same voltage: 12.52A on DC, 14.73A on AC single-phase.

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).

Is 7.2 kW single-phase or three-phase?expand_more

7.2 kW is available in both, but three-phase is more common for commercial HVAC, rooftop units, and motors once you reach this range.

Why do industrial systems use kW instead of watts?expand_more

Industrial equipment operates at higher power levels. 7.2 kW is easier to express than 7,200W. The math is identical, just scaled by 1000.

What size breaker would I need for 7.2 kW at 575V?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.

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.