Single Phase

kW to Amps Single Phase Calculator

Convert kilowatts to amps for single-phase electrical systems. Perfect for residential and light commercial applications.

Single Phase Calculator

Enter power and voltage to calculate current

Decimals:

Power (kW)

Voltage (V)

Power Factor (PF)

For resistive loads (heaters, lights) use PF = 1.0. For motors, use 0.8-0.9.

Current Result

23.15

Amps (A)

Formula: I = 5000 / (240 × 0.9) = 23.15 A

Single Phase Conversion Table

Power Factor = 0.9 (typical for mixed loads)

Power (kW)	110V	120V	220V	230V	240V
0.5 kW	5.05 A	4.63 A	2.53 A	2.42 A	2.31 A
1 kW	10.10 A	9.26 A	5.05 A	4.83 A	4.63 A
1.5 kW	15.15 A	13.89 A	7.58 A	7.25 A	6.94 A
2 kW	20.20 A	18.52 A	10.10 A	9.66 A	9.26 A
2.5 kW	25.25 A	23.15 A	12.63 A	12.08 A	11.57 A
3 kW	30.30 A	27.78 A	15.15 A	14.49 A	13.89 A
4 kW	40.40 A	37.04 A	20.20 A	19.32 A	18.52 A
5 kW	50.51 A	46.30 A	25.25 A	24.15 A	23.15 A
6 kW	60.61 A	55.56 A	30.30 A	28.99 A	27.78 A
7.5 kW	75.76 A	69.44 A	37.88 A	36.23 A	34.72 A
10 kW	101.01 A	92.59 A	50.51 A	48.31 A	46.30 A
15 kW	151.52 A	138.89 A	75.76 A	72.46 A	69.44 A

Understanding Single Phase Power

What is Single Phase?

Single-phase power uses two wires (live and neutral) to deliver electrical power. It's the most common form of electricity distribution for homes and small businesses.

In North America, standard residential outlets provide 120V single-phase, while larger appliances use 240V. In Europe, Australia, and most other regions, 220-240V is standard.

Power Factor Explained

Power factor measures how efficiently electrical power is being used. It ranges from 0 to 1, where 1 means 100% efficiency.

PF = 1.0: Resistive loads (heaters, incandescent lights)
PF = 0.9-0.95: LED lighting, modern appliances
PF = 0.8-0.9: Motors, air conditioners

Calculator

Frequently Asked Questions

How many amps is 1 kW?+

It depends on voltage and system type. For DC: I = 1000 W ÷ V (e.g., at 230 V, ≈ 4.35 A). For AC single-phase: I = 1000 ÷ (V × PF). For three-phase (L-L): I = 1000 ÷ (√3 × VLL × PF).

How many kilowatts is 1 ampere?+

For DC: kW = (V × 1 A) ÷ 1000. For example, at 240 V → 0.24 kW. For AC systems, multiply by the power factor and use the correct single-phase or three-phase formula.

How many amps make 1 kWh?+

kWh is energy, not current. To relate amps to kWh you must include voltage, power factor (for AC), and time. For example, 10 A at 230 V, PF 1 for 1 hour ≈ 2.3 kWh.

What is 5 kW in amps?+

It depends on voltage, system, and PF. Single-phase 240 V at PF 0.9 → I ≈ 5000 ÷ (240 × 0.9) ≈ 23.15 A. Three-phase 400 V L-L at PF 0.9 → I ≈ 5000 ÷ (√3 × 400 × 0.9) ≈ 8.01 A.

Can you convert kW to amps?+

Yes! You can convert kW to amps if you know the voltage and power factor. Use our calculator above or apply the formula: I = P ÷ (V × PF) for single-phase, or I = P ÷ (√3 × V × PF) for three-phase systems.

What is the kW to amps formula?+

For DC: I = P ÷ V. For single-phase AC: I = P ÷ (V × PF). For three-phase AC (line-to-line): I = P ÷ (√3 × V × PF). P is power in watts, V is voltage, and PF is power factor.

How to calculate kW to amps at 240V?+

At 240V single-phase with PF 0.9: Amps = (kW × 1000) ÷ (240 × 0.9). For example, 5 kW = 5000 ÷ 216 = 23.15 A. Use PF = 1.0 for resistive loads like heaters.

What power factor should I use?+

Use PF 1.0 for resistive loads (heaters, incandescent lights). Use PF 0.85-0.95 for motors, and 0.9-0.98 for modern LED lighting. When in doubt, use 0.85 for a conservative estimate.

What is the difference between single-phase and 3-phase conversion?+

Single-phase uses I = P ÷ (V × PF). Three-phase includes √3 (≈1.732) factor: I = P ÷ (√3 × V × PF). Three-phase carries more power at lower current, making it more efficient for high-power applications.

How to convert generator kW to amps?+

For generator sizing, use the same formulas based on phase type. A 10 kW single-phase generator at 240V, PF 0.9 provides about 46.3 A. For three-phase at 415V, PF 0.85, it provides about 16.4 A per phase.

What is the difference between kW and kWh?+

kW (kilowatts) measures power — the rate of energy use at any instant. kWh (kilowatt-hours) measures energy — total power consumed over time. 1 kW running for 1 hour = 1 kWh.

How to convert kW to amps at 440V three-phase?+

At 440V three-phase (L-L) with PF 0.85: Amps = (kW × 1000) ÷ (1.732 × 440 × 0.85). For 10 kW: 10000 ÷ 647.5 = 15.44 A per phase. This is common for industrial motors.