Put 7 kilowatts into the exact factor of 1.34102209 and you get 9.387154627 hp. Written out: 7 × 1.34102209 = 9.38715462717 horsepower, with no rounding applied until the final display.
7 kW is 9.387 mechanical horsepower and 9.517 metric PS. Put that through a 1,400 kg car at 80% drivetrain efficiency and the energy needed to reach 100 km/h — 540.1 kJ — takes about 96.5 seconds to deliver, which is a floor rather than a real figure because it ignores drag and traction limits.
The result sits 0.3872 hp past 9 hp, so if you need a round figure to quote, 9 hp is the honest nearest one. Plenty of people do this in their head: multiply by 1.3 instead of using the exact factor 1.34102209. At 7 that shortcut gives 9.1 horsepower, off by 0.2872 horsepower or about 3.06%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
The formula
7 kW- The quantity being converted
1.34102209- Exact horsepower in one kilowatt
9.387154627 hp- The converted result
How it works, step by step
- Take the kilowatt value, 7.
- Scale it by 1.34102209 — that is how many horsepower fit in a single kilowatt.
- Result: 9.38715462717 horsepower.
- Going the other way, divide rather than multiply — 9.387154627 hp ÷ 1.34102209 brings you back to 7 kW.
Worked examples
Working it through
Take 7 kW and multiply by the factor 1.34102209. The product is 9.38715462717 hp, and that is the entire method.
Proving it both ways
Divide the answer back: 9.387154627 hp ÷ 1.34102209 returns 7 kW. If a converter fails this test it has inverted the factor, which is the single most common conversion error there is.
How to read your score
Frequently asked questions
What is 7 kilowatts in horsepower?
It comes to 9.387154627 hp. The unrounded figure is 9.38715462717 horsepower, if you need to carry it forward.
How do you convert kilowatts to horsepower?
Use the factor 1.34102209 as a multiplier — 7 × 1.34102209 gives 9.387154627 horsepower. The same factor works at any scale because the relationship is linear.
What is 9.387154627 horsepower back in kilowatts?
Divide by 1.34102209, or multiply by 0.7456998716 — either returns 7 kilowatts.
How much is 7 kW in practice?
7 kW is 9.387 mechanical horsepower and 9.517 metric PS. Put that through a 1,400 kg car at 80% drivetrain efficiency and the energy needed to reach 100 km/h — 540.1 kJ — takes about 96.5 seconds to deliver, which is a floor rather than a real figure because it ignores drag and traction limits. The reference table shows the values either side of it for comparison.
What is a kilowatt?
The rating unit for motors, EV chargers and solar arrays.
What is a horsepower?
Mechanical horsepower, defined by James Watt as 550 foot-pounds per second.
7 kW in horsepower — nearby values
| Kilowatts | Horsepower | Unrounded |
|---|---|---|
| 1 kW | 1.3410221 | 1.34102209 |
| 2 kW | 2.6820442 | 2.682044179 |
| 3 kW | 4.0230663 | 4.023066269 |
| 4 kW | 5.3640884 | 5.364088358 |
| 5 kW | 6.7051104 | 6.705110448 |
| 6 kW | 8.0461325 | 8.046132538 |
| 7 kW | 9.3871546 | 9.387154627 |
| 8 kW | 10.728177 | 10.72817672 |
| 9 kW | 12.069199 | 12.06919881 |
| 10 kW | 13.410221 | 13.4102209 |
| 11 kW | 14.751243 | 14.75124299 |
| 12 kW | 16.092265 | 16.09226508 |
| 13 kW | 17.433287 | 17.43328716 |
Exact factor: 1 kilowatt = 1.3410220896 horsepower. The row for 7 kW is the value this page is about.