kW to Amps Calculator

Convert kilowatts (kW) to amps for DC and AC circuits. Enter power in kW and voltage to calculate current. Supports single-phase and three-phase AC with power factor.

kW
V

CURRENT

20.83 A


KILOWATTS

5 kW

CIRCUIT

DC

FORMULA

I=(kWΓ—1000)/V

kW to Amps β€” Reference Table

kW120V208V240V480V
1 kW8.33 A4.81 A4.17 A2.08 A
2 kW16.67 A9.62 A8.33 A4.17 A
3 kW25 A14.42 A12.5 A6.25 A
5 kW41.67 A24.04 A20.83 A10.42 A
7.5 kW62.5 A36.06 A31.25 A15.63 A
10 kW83.33 A48.08 A41.67 A20.83 A
15 kW125 A72.12 A62.5 A31.25 A
20 kW166.67 A96.15 A83.33 A41.67 A
25 kW208.33 A120.19 A104.17 A52.08 A
50 kW416.67 A240.38 A208.33 A104.17 A

πŸ’‘ How to Convert kW to Amps

Kilowatts (kW) measure real power β€” the useful power doing actual work. Converting kW to amps tells you the current draw of your equipment, which is critical for wire sizing, breaker selection, and circuit planning.

kW to Amps Formula

DC: I = (kW Γ— 1,000) / V
AC 1-Phase: I = (kW Γ— 1,000) / (V Γ— PF)
AC 3-Phase: I = (kW Γ— 1,000) / (V Γ— PF Γ— √3)

Example: 5 kW Load on 240V Single-Phase

I = (5 Γ— 1,000) / (240 Γ— 0.85) = 24.5 amps
A 5 kW load at 240V with PF=0.85 draws about 24.5 amps β€” requires a 30A breaker.

References

  • NFPA 70 β€” National Electrical Code (NEC), 2023
  • IEEE Std 141 β€” Electric Power Distribution
5 kW at 240V (PF=0.85) = 24.5 amps. Use this to size breakers and wiring for your kW-rated equipment.

kW to Amps Calculator FAQ