Reference Chart

kW to Amps Conversion Chart

Complete reference tables for converting kilowatts to amperes. Includes single-phase, three-phase, and motor-specific charts.

Single Phase

I = P / (V × PF)

Standard formula for single-phase AC systems

Three Phase

I = P / (√3 × V × PF)

Line-to-Line voltage for 3-phase systems

Single Phase kW to Amps Chart

Power Factor = 0.9

Power (kW)	120V	220V	240V
0.5 kW	4.6 A	2.5 A	2.3 A
0.75 kW	6.9 A	3.8 A	3.5 A
1 kW	9.3 A	5.1 A	4.6 A
1.5 kW	13.9 A	7.6 A	6.9 A
2 kW	18.5 A	10.1 A	9.3 A
2.5 kW	23.1 A	12.6 A	11.6 A
3 kW	27.8 A	15.2 A	13.9 A
4 kW	37.0 A	20.2 A	18.5 A
5 kW	46.3 A	25.3 A	23.1 A
6 kW	55.6 A	30.3 A	27.8 A
7.5 kW	69.4 A	37.9 A	34.7 A
10 kW	92.6 A	50.5 A	46.3 A
15 kW	138.9 A	75.8 A	69.4 A
20 kW	185.2 A	101.0 A	92.6 A
25 kW	231.5 A	126.3 A	115.7 A
30 kW	277.8 A	151.5 A	138.9 A
40 kW	370.4 A	202.0 A	185.2 A
50 kW	463.0 A	252.5 A	231.5 A
60 kW	555.6 A	303.0 A	277.8 A
75 kW	694.4 A	378.8 A	347.2 A
100 kW	925.9 A	505.1 A	463.0 A

Three Phase kW to Amps Chart

Line-to-Line Voltage, Power Factor = 0.85

Power (kW)	380V	415V	440V	480V
0.5 kW	0.9 A	0.8 A	0.8 A	0.7 A
0.75 kW	1.3 A	1.2 A	1.2 A	1.1 A
1 kW	1.8 A	1.6 A	1.5 A	1.4 A
1.5 kW	2.7 A	2.5 A	2.3 A	2.1 A
2 kW	3.6 A	3.3 A	3.1 A	2.8 A
2.5 kW	4.5 A	4.1 A	3.9 A	3.5 A
3 kW	5.4 A	4.9 A	4.6 A	4.2 A
4 kW	7.1 A	6.5 A	6.2 A	5.7 A
5 kW	8.9 A	8.2 A	7.7 A	7.1 A
6 kW	10.7 A	9.8 A	9.3 A	8.5 A
7.5 kW	13.4 A	12.3 A	11.6 A	10.6 A
10 kW	17.9 A	16.4 A	15.4 A	14.2 A
15 kW	26.8 A	24.6 A	23.2 A	21.2 A
20 kW	35.7 A	32.7 A	30.9 A	28.3 A
25 kW	44.7 A	40.9 A	38.6 A	35.4 A
30 kW	53.6 A	49.1 A	46.3 A	42.5 A
40 kW	71.5 A	65.5 A	61.7 A	56.6 A
50 kW	89.4 A	81.8 A	77.2 A	70.8 A
60 kW	107.2 A	98.2 A	92.6 A	84.9 A
75 kW	134.1 A	122.8 A	115.8 A	106.1 A
100 kW	178.7 A	163.7 A	154.4 A	141.5 A

Electric Motor kW to Amps Chart

Three-phase motors at 415V, Power Factor = 0.85

Motor (HP)	Power (kW)	380V	415V	440V	480V
0.5 HP	0.37 kW	0.7 A	0.6 A	0.6 A	0.5 A
0.75 HP	0.56 kW	1.0 A	0.9 A	0.9 A	0.8 A
1 HP	0.75 kW	1.3 A	1.2 A	1.2 A	1.1 A
1.5 HP	1.1 kW	2.0 A	1.8 A	1.7 A	1.6 A
2 HP	1.5 kW	2.7 A	2.5 A	2.3 A	2.1 A
3 HP	2.2 kW	3.9 A	3.6 A	3.4 A	3.1 A
5 HP	3.7 kW	6.6 A	6.1 A	5.7 A	5.2 A
7.5 HP	5.5 kW	9.8 A	9.0 A	8.5 A	7.8 A
10 HP	7.5 kW	13.4 A	12.3 A	11.6 A	10.6 A
15 HP	11 kW	19.7 A	18.0 A	17.0 A	15.6 A
20 HP	15 kW	26.8 A	24.6 A	23.2 A	21.2 A
25 HP	18.5 kW	33.1 A	30.3 A	28.6 A	26.2 A
30 HP	22 kW	39.3 A	36.0 A	34.0 A	31.1 A
40 HP	30 kW	53.6 A	49.1 A	46.3 A	42.5 A
50 HP	37 kW	66.1 A	60.6 A	57.1 A	52.4 A
60 HP	45 kW	80.4 A	73.7 A	69.5 A	63.7 A
75 HP	55 kW	98.3 A	90.0 A	84.9 A	77.8 A
100 HP	75 kW	134.1 A	122.8 A	115.8 A	106.1 A

Important Notes

About These Charts

• Single-phase calculations use PF = 0.9 (typical mixed load)
• Three-phase uses PF = 0.85 (typical industrial motors)
• All three-phase values are for line-to-line voltage
• Motor values are approximate; check nameplate data

Power Factor Guidelines

• PF 1.0: Resistive loads (heaters, incandescent lights)
• PF 0.9-0.95: LED lighting, modern electronics
• PF 0.8-0.9: Motors at full load
• PF 0.6-0.8: Motors at partial load

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.