DailyCalc

Horsepower (mechanical) to Kilowatts (hp to kW)

1 hp ≈ 0.7457 kW. Type any value to convert it.

1 horsepower (mechanical) =

0.7456998716 kW

kilowatts

Conversion factor
1 hp ≈ 0.7456998716 kW

Fix the highlighted field to update the result.

Show in all common units
1 hp in other units
UnitValue
watt (W)745.6998716 W
kilowatt (kW)0.7456998716 kW
megawatt (MW)0.0007456998716 MW
horsepower (mechanical) (hp)1 hp
metric horsepower (PS) (PS)1.013869665 PS
BTU per hour (BTU/h)2,544.433578 BTU/h
ton of refrigeration (TR)0.2120361315 TR

How to convert horsepower (mechanical) to kilowatts

1 hp ≈ 0.7457 kW

1 hp (mechanical, 550 ft·lbf/s) ≈ 745.6999 W (NIST SP 811 B.9) ≈ 0.7456999 kW. Metric hp (PS) is 735.49875 W and electrical hp is 746 W exactly.

Examples

  • 100 hp = 74.569987 kW: an engine rated in horsepower
  • 300 hp = 223.70996 kW: a performance car engine rating
  • 0.5 hp = 0.37284994 kW: a garden pump motor

Hp to kW chart

Horsepower (mechanical) to kilowatts
Horsepower (mechanical) (hp)Kilowatts (kW)
0.5 hp0.37284994 kW
1 hp0.74569987 kW
2 hp1.4913997 kW
3 hp2.2370996 kW
4 hp2.9827995 kW
5 hp3.7284994 kW
10 hp7.4569987 kW
15 hp11.185498 kW
20 hp14.913997 kW
25 hp18.642497 kW
50 hp37.284994 kW
75 hp55.92749 kW
100 hp74.569987 kW
300 hp223.70996 kW

Common mistakes

  • hp and kW measure power; kWh measures energy. A 100 kW motor running for 2 hours uses 200 kWh.
  • For a figure in PS, use 0.7355 kW per PS. Applying the mechanical factor to PS overstates kW by about 1.4%.

Frequently asked questions

How many kW is 1 hp?

1 mechanical horsepower is about 0.7457 kW. Multiply hp by 0.7457; a 100 hp engine is about 74.57 kW.

What is 300 hp in kW?

300 hp is about 223.7 kW in mechanical horsepower. If the figure is metric horsepower (PS), it is about 220.6 kW.

Which horsepower does this converter use?

Mechanical horsepower, about 745.7 W. Metric horsepower (PS) is about 1.4% smaller and electrical horsepower (746 W) about 0.04% larger.