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Horsepower (HP) to Watts (W) conversion is a fundamental unit conversion in physics and engineering that converts mechanical power (horsepower) to electrical power (watts) using the standard conversion factor of 745.7 watts per horsepower.
The calculator uses the conversion formula:
Where:
Explanation: This conversion factor is derived from the definition of one horsepower as the power needed to lift 550 pounds by one foot in one second, which equals approximately 745.7 watts.
Details: Accurate power conversion is essential for comparing mechanical and electrical systems, sizing electrical components for motor applications, and ensuring compatibility between different power measurement systems in engineering and industrial applications.
Tips: Enter horsepower value in the input field. The value must be positive and greater than zero. The calculator will automatically compute the equivalent power in watts.
Q1: Why is the conversion factor 745.7?
A: This value comes from the mechanical definition of one horsepower as 550 foot-pounds per second, which converts to approximately 745.7 watts in the metric system.
Q2: Are there different types of horsepower?
A: Yes, there are mechanical horsepower (745.7 W), metric horsepower (735.5 W), and electrical horsepower (746 W). This calculator uses mechanical horsepower.
Q3: When is this conversion commonly used?
A: Commonly used in automotive industry, electrical engineering, motor specifications, and when comparing mechanical power to electrical power requirements.
Q4: How accurate is this conversion?
A: The conversion is mathematically exact for mechanical horsepower definition, though real-world efficiency factors may affect actual power output.
Q5: Can I convert watts back to horsepower?
A: Yes, use the inverse formula: HP = W ÷ 745.7 to convert watts back to horsepower.