DailyCalc

Horsepower (mechanical) to Watts (hp to W)

1 hp ≈ 745.7 W. Type any value to convert it.

1 horsepower (mechanical) =

745.6998716 W

watts

Conversion factor
1 hp ≈ 745.6998716 W

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 watts

1 hp ≈ 745.7 W

1 hp (mechanical, 550 ft·lbf/s) ≈ 745.6999 W (NIST SP 811 B.9). Electrical hp = 746 W exactly; metric hp (PS) = 735.49875 W exactly.

Examples

  • 0.5 hp = 372.84994 W: a half-horsepower garbage disposal
  • 0.25 hp = 186.42497 W: a quarter-horsepower fan motor
  • 2 hp = 1,491.3997 W: a pool pump rated in horsepower

Hp to watts chart

Horsepower (mechanical) to watts
Horsepower (mechanical) (hp)Watts (W)
0.25 hp186.42497 W
0.5 hp372.84994 W
1 hp745.69987 W
2 hp1,491.3997 W
3 hp2,237.0996 W
4 hp2,982.7995 W
5 hp3,728.4994 W
10 hp7,456.9987 W
15 hp11,185.498 W
20 hp14,913.997 W
25 hp18,642.497 W
50 hp37,284.994 W
75 hp55,927.49 W
100 hp74,569.987 W

Common mistakes

  • Use the horsepower your source uses: mechanical (about 745.7 W), electrical (746 W) or metric (about 735.5 W).
  • Horsepower to watts gives power. To get energy in kWh, multiply the kW figure by the hours of use.

Frequently asked questions

How many watts is 1 hp?

About 745.7 W for mechanical horsepower. Electrical horsepower is exactly 746 W and metric horsepower about 735.5 W.

What is 0.5 hp in watts?

About 372.8 W in mechanical horsepower, or exactly 373 W in electrical horsepower.

What is 2 hp in watts?

About 1,491 W (1.491 kW) using mechanical horsepower.