Horsepower to kW Calculator
Convert between horsepower and kilowatts for power calculations
How to Use
- Enter the power value you want to convert
- Select the input unit (horsepower or kilowatts)
- Click calculate to see the converted value
- View the conversion factor used
What is Horsepower?
Horsepower (hp) is a unit of power that was originally developed to compare the output of steam engines with the power of draft horses. It's still widely used in automotive and mechanical engineering applications.
There are different types of horsepower: mechanical horsepower, metric horsepower, and electrical horsepower. The most common conversion uses mechanical horsepower, where 1 hp = 0.7457 kW.
What is a Kilowatt?
A kilowatt (kW) is a unit of power in the International System of Units (SI). It represents 1,000 watts and is commonly used to measure electrical power, engine power, and other forms of power output.
Kilowatts are the standard unit for power in most countries and are used in scientific, engineering, and commercial applications worldwide.
Conversion Standards
The standard conversion between horsepower and kilowatts is based on the mechanical horsepower definition:
- 1 horsepower (hp) = 0.7457 kilowatts (kW)
- 1 kilowatt (kW) = 1.341 horsepower (hp)
- This conversion is used in automotive, mechanical engineering, and most industrial applications
Common Applications
- Automotive: Engine power ratings, performance specifications
- Mechanical Engineering: Motor sizing, pump specifications
- Industrial: Equipment power requirements, system design
- Electrical: Generator ratings, motor specifications
- Marine: Boat engine power, propulsion systems
Frequently Asked Questions
- What's the difference between horsepower and kilowatts?
- Horsepower is an imperial unit of power, while kilowatts are the metric/SI unit. 1 horsepower equals approximately 0.7457 kilowatts. Both measure the rate of doing work or energy transfer.
- Which countries use horsepower vs kilowatts?
- Horsepower is commonly used in the United States and some other countries for automotive applications. Kilowatts are the standard in most countries worldwide and are used in scientific and engineering contexts.
- Are there different types of horsepower?
- Yes, there are mechanical horsepower (0.7457 kW), metric horsepower (0.7355 kW), and electrical horsepower (0.746 kW). The mechanical horsepower is most commonly used for automotive and mechanical applications.
- Why do car engines show both hp and kW?
- Many car manufacturers show both units to cater to different markets. Some countries require power ratings in kilowatts, while others are more familiar with horsepower. It also helps with international sales and comparisons.