Kilowatts to Horsepower (mechanical) Converter

1 kW equals 1.3410221 hp, and 1 hp equals 0.74569987 kW. Enter a value in either box to convert kilowatts to horsepower (mechanical) and back. Formula: watts = value x unit factor (1 hp = 550 ft-lbf/s = 745.6998715822702 W; 1 PS = 75 kgf-m/s = 735.49875 W).

· CalcFlow Editorial

1 kW = 1.3410221 hp

Results shown are estimates for informational purposes only. Nothing on CalcFlow is financial, tax, legal, or medical advice. Always consult a qualified professional before making important decisions.

Kilowatts to Horsepower (mechanical) Conversion Table

KilowattsHorsepower (mechanical)
1 kW1.3410221 hp
5 kW6.7051104 hp
10 kW13.410221 hp
50 kW67.051104 hp
100 kW134.10221 hp
150 kW201.15331 hp
200 kW268.20442 hp
500 kW670.51104 hp
1,000 kW1,341.0221 hp

Horsepower (mechanical) to Kilowatts Conversion Table

Horsepower (mechanical)Kilowatts
1 hp0.74569987 kW
5 hp3.7284994 kW
10 hp7.4569987 kW
50 hp37.284994 kW
100 hp74.569987 kW
150 hp111.85498 kW
200 hp149.13997 kW
500 hp372.84994 kW
1,000 hp745.69987 kW

Worked example: 10 kW = 13.410221 hp. A 150 hp engine delivers 150 x 745.7 = 111.85 kW. A 12,000 BTU/h air conditioner draws about 12,000 x 0.29307 = 3,517 W of cooling capacity.

Need other units? Open the full Power Converter.

Popular Power Conversions

Horsepower (mechanical) to KilowattsWatts to Horsepower (mechanical)Horsepower (mechanical) to WattsHorsepower (metric) to KilowattsKilowatts to Horsepower (metric)

Formula

watts = value x unit factor (1 hp = 550 ft-lbf/s = 745.6998715822702 W; 1 PS = 75 kgf-m/s = 735.49875 W)

Understanding Power Conversion

Power is the rate of doing work, with the watt (one joule per second) as the SI unit. Engines are still rated in horsepower in many markets. Mechanical horsepower (used in the US and UK) is exactly 550 foot-pounds per second, about 745.7 W, while metric horsepower (PS or CV, used in continental Europe) is 75 kilogram-force meters per second, about 735.5 W. Air conditioners and furnaces are often rated in BTU per hour.

Tips and Best Practices

  • 1Multiply horsepower by 0.7457 to get kilowatts.
  • 2Multiply kilowatts by 1.341 to get mechanical horsepower.
  • 3One BTU per hour is about 0.293 W.

Real-World Example

A 150 hp engine delivers 150 x 745.7 = 111.85 kW. A 12,000 BTU/h air conditioner draws about 12,000 x 0.29307 = 3,517 W of cooling capacity.

Common Mistakes to Avoid

  • Treating metric and mechanical horsepower as the same; they differ by about 1.4 percent.
  • Confusing BTU (energy) with BTU per hour (power).
  • Reading a kW rating as kWh.

How to Use

  1. Type a number in the Kilowatts box.
  2. The Horsepower (mechanical) result appears instantly; you can also edit the Horsepower (mechanical) box to convert backwards.
  3. Use the swap button to reverse the direction and Copy result to copy the answer.

Frequently Asked Questions

Q

How many horsepower (mechanical) are in 1 kW?

1 kW equals 1.3410221 hp.
Q

How many kilowatts are in 1 hp?

1 hp equals 0.74569987 kW.
Q

What is the formula to convert kilowatts to horsepower (mechanical)?

watts = value x unit factor (1 hp = 550 ft-lbf/s = 745.6998715822702 W; 1 PS = 75 kgf-m/s = 735.49875 W).
Q

Is a PS the same as a hp?

No. One metric horsepower (PS) is 735.49875 W, slightly less than a mechanical horsepower.

Sources: NIST SP 811 (horsepower = 550 ft lbf/s; BTU_IT); DIN 66036 (metric horsepower = 75 kgf m/s with g_n = 9.80665 m/s2).

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