kW to HP Calculator
Enter power in kilowatts and choose the horsepower type to get an instant conversion.
Tip: Press Enter while typing to calculate quickly.
What this convert kW to hp calculator does
This calculator converts kilowatts (kW) to horsepower (hp) using the most common standards used in engineering, automotive specs, and industrial equipment documentation. If you are comparing motor ratings, generator output, pump size, or vehicle power, this tool helps you translate values correctly.
kW to hp conversion formula
The conversion depends on the horsepower definition. Use the right formula for your application:
- Mechanical horsepower (imperial): hp = kW × 1.34102209
- Metric horsepower (PS/CV): hp = kW × 1.35962162
- Electrical horsepower: hp = kW × 1.34048257
In many practical cases, people round and use 1 kW ≈ 1.34 hp (imperial) or 1 kW ≈ 1.36 PS (metric).
Quick reference table
| kW | Mechanical hp | Metric hp (PS) | Electrical hp |
|---|---|---|---|
| 1 | 1.3410 | 1.3596 | 1.3405 |
| 5 | 6.7051 | 6.7981 | 6.7024 |
| 10 | 13.4102 | 13.5962 | 13.4048 |
| 25 | 33.5256 | 33.9905 | 33.5121 |
| 50 | 67.0511 | 67.9811 | 67.0241 |
| 100 | 134.1022 | 135.9622 | 134.0483 |
When to use each horsepower type
Mechanical horsepower (hp)
Common in the U.S. for engines, machinery, and many datasheets. If your manual just says “hp” without any extra notation, this is often what it means.
Metric horsepower (PS or CV)
Used frequently in Europe and some international vehicle and equipment specifications. If your source mentions PS or CV, choose metric horsepower.
Electrical horsepower (hpE)
Appears in some electrical and motor contexts. It is very close to mechanical horsepower, but not exactly the same, which matters for precise calculations.
Common mistakes to avoid
- Using the wrong horsepower standard for the region or equipment type.
- Rounding too early during engineering calculations.
- Confusing power (kW/hp) with energy (kWh).
- Comparing motor input power and output power without accounting for efficiency losses.
Practical examples
Example 1: Motor sizing
A motor is rated at 22 kW. Using mechanical horsepower: 22 × 1.34102209 = 29.5025 hp. You might see this rounded to 29.5 hp.
Example 2: International equipment catalog
A catalog lists 7.5 kW and asks for PS: 7.5 × 1.35962162 = 10.1972 PS.
Example 3: Quick estimate
For a fast mental conversion, multiply by about 1.34. A 15 kW unit is roughly: 15 × 1.34 ≈ 20.1 hp.
FAQ: convert kW to hp
Is 1 kW exactly 1.34 hp?
Not exactly. It depends on horsepower definition. For mechanical horsepower, 1 kW is 1.34102209 hp.
Why are there different hp values for the same kW?
Horsepower has multiple standards developed historically in different systems. kW is SI-based and standardized, but hp has variants.
Can I use this for car engines and electric motors?
Yes. Just pick the horsepower standard that matches your source documents and region.
Final takeaway
The best way to convert kW to hp accurately is to choose the correct standard first, then apply the right factor. Use the calculator above whenever you need reliable power conversion for engineering, automotive, industrial, or academic work.