Horsepower to Kilowatt Converter
Enter the value that you want to convert horsepower (hp) to kilowatt (kW) or kilowatt to horsepower.Also written as HP to KW conversion.
1 horsepower = 0.7456999 kilowatt
Formula: kilowatt = horsepower value × 0.7456999
HP to KW — horsepower to kilowatt
10 horsepower = 7.45700 kilowatt
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Horsepower to Kilowatt: The Essentials
The Horsepower in Engineering
Horsepower (hp) is a unit of power measurement. 1 horsepower is equal to 0.7456999 kilowatt.
The Kilowatt in Engineering
Kilowatt (kW) is a unit of power measurement. 1 kilowatt is equal to 1.3410221 horsepower.
Power Measurement Across Applications
Power units span from milliwatts in electronics to megawatts in power plants. Engine output is still quoted in horsepower (mechanical, metric, and electrical — all slightly different). HVAC systems rate cooling in tons of refrigeration or BTU/hour. Solar panels specify watts peak. Electric motors list watts or kilowatts. Each industry carries its historical unit preferences, making conversion between them a daily necessity.
horsepower to kilowatt metric conversion table
| 0.01 hp | = | 0.00746 kW |
| 0.1 hp | = | 0.07457 kW |
| 1 hp | = | 0.74570 kW |
| 2 hp | = | 1.49140 kW |
| 3 hp | = | 2.23710 kW |
| 4 hp | = | 2.98280 kW |
| 5 hp | = | 3.72850 kW |
| 6 hp | = | 4.47420 kW |
| 7 hp | = | 5.21990 kW |
| 8 hp | = | 5.96560 kW |
| 9 hp | = | 6.71130 kW |
| 10 hp | = | 7.45700 kW |
| 11 hp | = | 8.20270 kW |
| 12 hp | = | 8.94840 kW |
| 13 hp | = | 9.69410 kW |
| 14 hp | = | 10.43980 kW |
| 15 hp | = | 11.18550 kW |
| 16 hp | = | 11.93120 kW |
| 17 hp | = | 12.67690 kW |
| 18 hp | = | 13.42260 kW |
| 19 hp | = | 14.16830 kW |
| 20 hp | = | 14.91400 kW |
| 30 hp | = | 22.37100 kW |
| 40 hp | = | 29.82799 kW |
| 50 hp | = | 37.28499 kW |
| 60 hp | = | 44.74199 kW |
| 70 hp | = | 52.19899 kW |
| 80 hp | = | 59.65599 kW |
| 90 hp | = | 67.11299 kW |
| 100 hp | = | 74.56999 kW |
| 200 hp | = | 149.13997 kW |
| 300 hp | = | 223.70996 kW |
| 400 hp | = | 298.27995 kW |
| 500 hp | = | 372.84994 kW |
| 600 hp | = | 447.41992 kW |
| 700 hp | = | 521.98991 kW |
| 800 hp | = | 596.55990 kW |
| 900 hp | = | 671.12988 kW |
| 1000 hp | = | 745.69987 kW |
How to Convert HP to KW (Horsepower to Kilowatt)?
We can convert horsepower to kilowatt by using an example.
Example:
Convert 20 Horsepower to Kilowatt?
We know 1 Horsepower = 0.7456999 kilowatt; 1 Kilowatt = 1.3410221 horsepower.
20 horsepower = ___kW
20 × 0.7456999 = 14.91400 kW (we know 1 horsepower = 0.7456999 kilowatt)
Answer:
20 horsepower = 14.91400 kilowatt
Horsepower to Kilowatts for EV Comparisons and Motor Specs
Converting horsepower to kilowatts is critical when comparing vehicle specifications across markets. European, Asian, and international regulations use kilowatts, while US and UK markets use horsepower. One mechanical horsepower equals 0.7457 kilowatts. This conversion helps you make apples-to-apples comparisons between gas and electric vehicles.
- Identify the horsepower value.
- Multiply by 0.7457 to get kilowatts.
- Alternatively, multiply by 745.7 to get watts, then divide by 1,000.
- The result is power in kilowatts.
HP to kW: Vehicle and Motor Power Comparison
Horsepower ratings converted to kilowatts for international comparison:
| Horsepower | Kilowatt |
|---|---|
| 1 hp | 0.746 kW |
| 5 hp | 3.73 kW |
| 50 hp | 37.3 kW |
| 100 hp | 74.6 kW |
| 150 hp | 111.9 kW |
| 200 hp | 149.1 kW |
| 300 hp | 223.7 kW |
| 500 hp | 372.8 kW |
| 1,000 hp | 745.7 kW |
Worked Examples: HP to Kilowatts
Question 1: A Porsche 911 produces 379 hp. What is that in kilowatts?
Solution:
kW = hp × 0.7457
= 379 × 0.7457
= 282.6 kW
Answer: 379 hp = 282.6 kW — as listed in European spec sheets.
Question 2: A marine diesel engine is rated at 1,200 hp. Convert to kW.
Solution:
kW = hp × 0.7457
= 1,200 × 0.7457
= 894.8 kW
Answer: 1,200 hp = 894.8 kW marine propulsion.
Question 3: A 15 hp irrigation pump. Express in kW for solar system sizing.
Solution:
kW = hp × 0.7457
= 15 × 0.7457
= 11.19 kW
Answer: 15 hp = 11.19 kW — you would need at least a 12-15 kW solar array to power it directly.
Practice: HP to Kilowatts
Try solving these on your own to test your understanding:
- Convert 75 hp to kW. (Answer: 55.9 kW)
- A chainsaw motor is 3.5 hp. What is that in kW? (Answer: 2.61 kW)
- Convert 450 hp to kW. (Answer: 335.6 kW)
- A generator is rated at 20 hp. Express in kW. (Answer: 14.91 kW)
- A Formula 1 engine produces 1,000 hp. Convert to kW. (Answer: 745.7 kW)
International Vehicle Regulations and kW
The United Nations ECE regulations and EU type-approval require vehicle power to be stated in kilowatts. Insurance classifications in many European countries use kW brackets to determine premiums. Australia, Japan, and most Asian markets also use kW in official documents. When buying an imported vehicle, the compliance plate will show kW — knowing the hp-to-kW conversion helps compare with domestic listings.
Dynamometer Testing: Where hp Becomes kW
On a dynamometer (dyno), the machine measures torque and RPM, then calculates power. Modern dynos display results in both hp and kW simultaneously. Wheel horsepower (whp) measured at the wheels is 10-15% less than the engine hp (bhp) due to drivetrain losses. The same percentage loss applies whether measured in hp or kW.
Key Takeaways
- 1 hp = 0.7457 kW exactly.
- Multiply hp by 0.7457 (or approximately 3/4) to get kW.
- EU regulations require vehicle power in kW.
- The same engine shows lower numbers in kW than hp (by ~25%).
- Dyno results convert equally — drivetrain losses are percentage-based.
Horsepower to Kilowatt Conversion Formula
kilowatt = horsepower × 0.7456999
1 horsepower = 0.7456999 kilowatt
1 kilowatt = 1.3410221 horsepower
Reverse: horsepower = kilowatt × 1.3410221
Frequently Asked Questions
How many kilowatt are in 1 horsepower?
There are 0.7456999 kilowatt in 1 horsepower. To convert horsepower to kilowatt, multiply the value by 0.7456999.
How do I convert horsepower to kilowatt?
Multiply your horsepower value by 0.7456999 to get the equivalent in kilowatt. For example, 5 horsepower = 5 × 0.7456999 = 3.72850 kilowatt.
How do I convert kilowatt to horsepower?
Multiply your kilowatt value by 1.3410221 to get the equivalent in horsepower. Alternatively, divide by 0.7456999.
What is 10 horsepower in kilowatt?
10 horsepower is equal to 7.45700 kilowatt.
What is 100 horsepower in kilowatt?
100 horsepower is equal to 74.56999 kilowatt.