If you have ever looked at a European car’s spec sheet, a scooter listing, or an EV’s motor rating, you have probably run into power measured in kilowatts (kW) instead of horsepower (hp). In the US we talk in horsepower, but much of the world, and a lot of official documentation, uses kW. Converting between them is simple once you know the formula, and it is genuinely useful when you are comparing cars, sizing up an import, or just trying to understand what a listing actually means. This kW to horsepower converter guide gives you the formula, a quick chart, and worked examples.
The short version: 1 kW is about 1.34 horsepower. Multiply kilowatts by 1.34 to get horsepower, or divide horsepower by 1.34 to get kilowatts. That one relationship covers 95 percent of what you will ever need.
Convert power fast in our kW to HP calculator.
The formula
There are actually two slightly different “horsepower” units, which is where confusion creeps in:
- Mechanical (imperial) horsepower, the one used in the US and UK. 1 kW = 1.341 hp.
- Metric horsepower (PS or CV), used in much of Europe. 1 kW = 1.36 PS.
For US drivers, the number you want is mechanical horsepower, so the working formulas are:
- kW to hp: horsepower = kilowatts x 1.341
- hp to kW: kilowatts = horsepower / 1.341
If you see a European spec listing something in PS or CV rather than kW, note that PS is very slightly smaller than hp, about 0.986 hp per PS, so a car rated 150 PS is roughly 148 hp. Close enough that people often treat them as the same, but now you know why the numbers sometimes differ by a percent or two.
Quick conversion chart (kW to hp)
Using the 1.341 factor and rounding to whole horsepower:
- 50 kW is about 67 hp
- 75 kW is about 101 hp
- 100 kW is about 134 hp
- 110 kW is about 148 hp
- 125 kW is about 168 hp
- 150 kW is about 201 hp
- 175 kW is about 235 hp
- 200 kW is about 268 hp
- 250 kW is about 335 hp
- 300 kW is about 402 hp
A handy mental shortcut: multiply the kW figure by 1.34, or if you want a rough estimate in your head, add about a third. So 150 kW plus a third of 150 (about 50) gets you close to 200 hp. This shortcut is accurate enough for shopping and comparison, and only drifts off by a horsepower or two at the numbers most cars actually produce.
For context on what these figures mean in the real world, most everyday commuter cars sit somewhere between 100 and 200 hp (roughly 75 to 150 kW). Sporty models climb into the 250 to 400 hp range (about 185 to 300 kW), and full-size trucks and performance cars go higher still. Knowing the conversion lets you place any kW-quoted car on that mental scale instantly.
Worked examples
Example 1: A used European hatchback is listed at 85 kW. Multiply 85 x 1.341, which is about 114 hp. That is a modest but perfectly usable engine for a small car.
Example 2: An EV motor is rated at 150 kW. Multiply 150 x 1.341, giving about 201 hp. EVs deliver that power differently (instant torque), which is why they feel quicker than the horsepower number suggests.
Example 3: You want to go the other way. A truck is advertised at 400 hp and you want kW. Divide 400 by 1.341, which is about 298 kW.
Why the conversion matters when buying a car
Power figures come up more than you would expect in the used market, especially with imports and EVs:
- Imported cars often carry their original spec in kW on documentation, so converting lets you compare them fairly against US-spec listings. If you are looking at a car imported from Germany, for instance, the paperwork may quote kW.
- EVs and hybrids almost always state motor output in kW, so converting helps you compare a Tesla’s punch against a gas car’s horsepower. Our guide on buying a used electric car uses these figures throughout.
- Insurance and registration in some contexts reference power, and knowing the real figure keeps you from being misled by a listing that quotes an impressive-sounding kW number without context.
That said, horsepower alone does not tell you how a car drives. Torque, weight, gearing, and drivetrain all matter, and a heavy 200 hp SUV can feel slower than a light 150 hp hatchback. Power is one data point, not the whole story, and it says nothing about condition, which is what actually determines whether a used car is a good buy.
Do not let the spec sheet distract you from condition
A big horsepower number is exciting, but a used car’s history and mechanical health matter far more than a few kilowatts on paper. A powerful engine that was thrashed, poorly maintained, or has a hidden fault is worth less than a modest one that was babied. Before you get seduced by the power figure, run a proper inspection: check the VIN history, scan for OBD fault codes, and inspect the paint and structure. A tool like MotoPPI lets you do all of that from your phone, so you buy on real condition rather than a spec-sheet headline. Fold the power figure into the wider picture with our how to inspect a used car checklist.
The bottom line
To convert kW to horsepower, multiply by 1.341 (or roughly add a third). To go the other way, divide by 1.341. Watch out for metric PS and CV figures, which are very slightly different. Use the conversion to compare imports and EVs fairly, but remember that horsepower is just one number, and a car’s history and condition will tell you far more about whether it is worth your money.