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The horsepower to kilowatts conversion is a fundamental unit conversion used in engineering, automotive, and electrical applications to convert mechanical power (horsepower) to electrical power (kilowatts) using the standard conversion factor.
The calculator uses the standard conversion formula:
Where:
Explanation: This conversion factor is derived from the definition of 1 horsepower being equal to 745.7 watts, making 1 kW approximately 1.341 horsepower.
Details: Accurate power unit conversion is essential for comparing engine performance, electrical system design, international standards compliance, and technical specifications across different measurement systems.
Tips: Enter horsepower value in the input field. The value must be positive and valid. The calculator will automatically compute the equivalent kilowatt value with high precision.
Q1: Why is the conversion factor 0.7457?
A: This factor comes from the definition where 1 horsepower equals 745.7 watts, and since 1 kilowatt equals 1000 watts, the conversion becomes HP × 0.7457 = kW.
Q2: Are there different types of horsepower?
A: Yes, there are mechanical horsepower (hp(I)), metric horsepower (PS), and electrical horsepower. This calculator uses the standard mechanical horsepower (1 hp = 745.7 W).
Q3: What are common applications for this conversion?
A: Automotive engineering, electric motor specifications, generator ratings, industrial machinery, and international technical documentation often require HP to kW conversions.
Q4: How accurate is this conversion?
A: The conversion is mathematically exact for standard mechanical horsepower. For other horsepower definitions, slight variations may occur.
Q5: Can I convert kW back to HP?
A: Yes, to convert kilowatts to horsepower, use the formula: HP = kW ÷ 0.7457 or HP = kW × 1.341.