7.5 kW to Amps — How Many Amps Is 7.5 kW?
7.5 kW equals 31.25 amps at 240V (single phase) or 18.04 amps at 240V 3-phase. Common 7.5kW loads: EV charger (32A), large hot tub, 10 HP motor.
7.5 kW to Amps
31.25 A
at 240V single phase
7.5 kW Amps at Every Voltage
| Voltage | 1-Phase | 3-Phase |
|---|---|---|
| 120V | 62.50A | 36.09A |
| 208V | 36.06A | 20.82A |
| 240V | 31.25A | 18.04A |
| 277V | 27.08A | 15.63A |
| 480V | 15.63A | 9.02A |
The Formula
Single Phase: Amps = (kW × 1000) ÷ Volts. For 7.5 kW at 240V: (7.5 × 1000) ÷ 240 = 31.25A.
Three Phase: Amps = (kW × 1000) ÷ (Volts × 1.732). For 7.5 kW at 240V 3φ: (7.5 × 1000) ÷ (240 × 1.732) = 18.04A.
Wire and Breaker for 7.5 kW
At 240V single-phase (31.3A), recommended: 8 AWG copper with a 40A breaker. Use our Wire Size Calculator for exact sizing.
Disclaimer: Calculations for reference. Consult a licensed electrician.