Case 1
- Power to convert
- 100
- From unit
- Kilowatts (kW)
- To unit
- Mechanical horsepower (hp)
134.102209
Open with these valuesPower Converter
134.102209
Result: 134.102209Every unit is a fixed number of watts, so the value goes into watts and back out. The trap is that hp and PS are two different units with one everyday name: mechanical horsepower is 745.6999 W, metric horsepower (PS) is exactly 735.49875 W, so 100 kW reads as 134.10 hp but 135.96 PS.
Most-used pairs
each is its own pageKilowatts to metric horsepower1 kW = 1.359622 PSMetric horsepower to kilowatts1 PS = 0.735499 kWKilowatts to mechanical horsepower1 kW = 1.341022 hpMechanical horsepower to kilowatts1 hp = 0.7457 kWMechanical to metric horsepower1 hp = 1.01387 PSWatts to BTU per hour1 W = 3.412142 BTU/h
All 6 units
| Unit | Symbol | In W | Typical use |
|---|---|---|---|
| Watt | W | 1 | The SI unit of power |
| Kilowatt | kW | 1,000 | Electric motors, EV charging |
| Megawatt | MW | 1,000,000 | Power stations and wind farms |
| Mechanical horsepower | hp | 745.699871582 | 550 ft·lbf/s — quoted in the UK and US |
| Metric horsepower (PS) | PS | 735.49875 | 75 kgf·m/s — quoted by EU car makers |
| BTU per hour | BTU/h | 0.29307107 | Heating and air conditioning ratings |
Kilowatt to Metric horsepower (PS)
prints complete- 1 kW
- 1.359622 PS
- 2 kW
- 2.719243 PS
- 3 kW
- 4.078865 PS
- 4 kW
- 5.438486 PS
- 5 kW
- 6.798108 PS
- 6 kW
- 8.15773 PS
- 7 kW
- 9.517351 PS
- 8 kW
- 10.876973 PS
- 9 kW
- 12.236595 PS
- 10 kW
- 13.596216 PS
- 11 kW
- 14.955838 PS
- 12 kW
- 16.315459 PS
- 13 kW
- 17.675081 PS
- 14 kW
- 19.034703 PS
- 15 kW
- 20.394324 PS
- 16 kW
- 21.753946 PS
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Worked examples
Case 2
- Power to convert
- 100
- From unit
- Kilowatts (kW)
- To unit
- Metric horsepower (PS)
135.962162
Open with these valuesCase 3
- Power to convert
- 1000
- From unit
- Watts (W)
- To unit
- Kilowatts (kW)
1.000000
Open with these valuesHow it's calculated
result = value × (W per from-unit) ÷ (W per to-unit)
- StepEnter the power figure and pick the unit it is written in.
- StepThe figure is multiplied by the watts one of that unit stands for.
- ResultThat watt figure is divided by the watts of the unit you want.
Reference table
| From | To | Result |
|---|---|---|
| 1 W | BTU/h | 3.412142 |
| 1 hp | PS | 1.013870 |
| 1 kW | PS | 1.359622 |
| 100 kW | hp | 134.102209 |
| 100 kW | PS | 135.962162 |
| 1 PS | W | 735.498750 |
| 1 hp | W | 745.699872 |
Questions
How many horsepower are in a kilowatt?
One kilowatt is about 1.341022 mechanical horsepower, because a mechanical horsepower is 745.6999 watts. So 100 kW converts to about 134.102209 hp. In metric horsepower the same 100 kW is 135.962162 PS.
What is the difference between hp and PS?
Mechanical horsepower (hp) is 745.6999 watts, while metric horsepower (PS) is exactly 735.49875 watts — about 1.4 % smaller. European car makers usually quote PS, while hp is common in the UK and the US. The same engine therefore shows a slightly higher number in PS than in hp.
How do I convert watts to BTU per hour?
One watt is about 3.412142 BTU/h, so multiply a watt figure by 3.412142. Heating and cooling equipment is usually rated in BTU/h, which makes this the conversion for sizing an air conditioner against an electrical load.
Are the conversion factors exact or approximate?
They are standard definitions, not measurements. Metric horsepower is exactly 735.49875 W, mechanical horsepower is 550 ft·lbf/s ≈ 745.6999 W, and BTU/h uses the international-table BTU. The only rounding you see comes from showing six decimal places.
Sources and last check
Information, not professional advice.