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Amps to kW Converter

Convert amperes (A) to kilowatts (kW) for DC, single-phase AC, and three-phase AC circuits. Includes quick reference tables and conversion formulas.

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Quick Formula

DC: kW = A × V ÷ 1000  | Single-phase AC: kW = A × V × PF ÷ 1000  | Three-phase AC: kW = √3 × A × V × PF ÷ 1000

⚡ Enter Values

📊 Result

4.400
kW
4400.0
Watts (W)
5.900
Horsepower (HP)

Formula Used:

P(kW) = 20 A × 220 V × 1 ÷ 1000 = 4.400 kW

Input: 20 A @ 220V (PF: 1) | Type: Single-Phase AC

⚡ Understanding Amps and Kilowatts

Amperes (amps) measure electrical current—the flow of electrons through a conductor. Kilowatts (kW) measure power—the rate at which energy is consumed or produced. Converting between them requires knowing the voltage of your system.

Common Applications

  • Home appliances: Understanding power consumption for energy bills
  • Solar systems: Sizing inverters and calculating output
  • Generators: Determining capacity requirements
  • Industrial equipment: Selecting proper circuit breakers
  • EV charging: Understanding charging speed and power

Quick Reference

At 220V single-phase: 1 kW ≈ 4.55 amps (PF=1)
At 240V single-phase: 1 kW ≈ 4.17 amps (PF=1)
At 480V three-phase: 1 kW ≈ 1.2 amps (PF=1)

⚡ Quick Conversions @ 220V

10 A = 2.2 kW

20 A = 4.4 kW

30 A = 6.6 kW

50 A = 11 kW

100 A = 22 kW

200 A = 44 kW

*Single-phase, PF = 1.0

🔌 Common Voltages

110-120V: US residential

220-240V: US heavy appliances, EU/Asia residential

277V: US commercial lighting

380V: EU industrial 3-phase

480V: US industrial 3-phase

Frequently Asked Questions

To convert amps to kilowatts, multiply amps by volts and divide by 1000. For DC: kW = (A × V) / 1000. For single-phase AC: kW = (A × V × PF) / 1000. For three-phase AC: kW = (A × V × PF × √3) / 1000. The power factor (PF) is typically between 0.8 and 1.0 for most applications.

The number of amps in 1 kW depends on the voltage. At 120V (single-phase, PF=1): 1 kW = 8.33 amps. At 220V: 1 kW = 4.55 amps. At 240V: 1 kW = 4.17 amps. At 480V (three-phase, PF=1): 1 kW = 1.2 amps.

20 amps converted to kW depends on voltage: At 120V = 2.4 kW, at 220V = 4.4 kW, at 240V = 4.8 kW. These calculations assume a power factor of 1.0. For AC circuits with lower power factors, multiply by the PF value.

200 amps equals: 24 kW at 120V, 44 kW at 220V, 48 kW at 240V (single-phase, PF=1). For three-phase at 480V with PF=0.9, 200 amps equals approximately 149.8 kW.

Power factor (PF) is the ratio of real power to apparent power in an AC circuit, ranging from 0 to 1. It indicates how efficiently electrical power is being used. A PF of 1.0 means all power is used effectively. Motors and inductive loads typically have PF of 0.8-0.95. Lower PF means you need more amps to deliver the same real power.

Single-phase power uses one alternating current and is common in homes (120V/240V). Three-phase power uses three alternating currents 120° apart and is used in industrial settings (480V). Three-phase is more efficient for high-power applications and uses the √3 (1.732) multiplier in calculations.

⚡ Disclaimer: This calculator provides estimates for educational purposes. For electrical installations, always consult a licensed electrician and follow local electrical codes.