What is horsepower in power measurements?

Horsepower (hp) is a non-SI unit of power representing the rate of doing work, typically defined as 550 foot-pounds per second or about 745.7 watts in the common mechanical variant.

Why convert horsepower to milliwatt?

Converting horsepower to milliwatt helps translate traditional mechanical power ratings into smaller-scale electrical power units useful in technical and engineering contexts.

Are all horsepower units the same?

No, there are different horsepower variants such as mechanical and metric horsepower, and this tool uses the common mechanical horsepower definition for conversion.

How to Convert from Horsepower [hp, hp (UK)] to Milliwatt [mW]?

Learn how to easily convert power values from horsepower (hp, hp UK) to milliwatt (mW) using our reliable unit conversion tool designed for engineering and technical applications.

Horsepower [hp, hp (UK)]

Milliwatt [mW]

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Horsepower [hp, hp (UK)] to Milliwatt [mW] Conversion Table

Horsepower [hp, hp (UK)]	Milliwatt [mW]

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

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Interval

Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.

Horsepower [hp, hp (UK)] to Milliwatt [mW] Conversion Table
Horsepower [hp, hp (UK)]	Milliwatt [mW]

Explore More Power Units Converter

What Is This Tool?

This converter allows users to translate power measurements from the non-SI mechanical unit horsepower to the SI electrical unit milliwatt, facilitating precise conversions essential in various engineering fields.

How to Use This Tool?

Enter the power value expressed in horsepower (hp or hp UK)
Select the input unit as horsepower [hp, hp (UK)]
Choose milliwatt [mW] as the output unit
Click the convert button to view the equivalent power in milliwatts
Review conversion results for engineering or technical analysis

Key Features

Converts power values from horsepower (hp, hp UK) to milliwatt (mW)
Uses the common mechanical horsepower standard equal to approximately 745.7 watts
Browser-based and easy to use for quick power conversions
Ideal for translating mechanical power ratings into smaller electrical units
Provides clear examples for typical conversion values

Examples

Converting 1 horsepower results in approximately 745699.87 milliwatts
A value of 0.5 horsepower converts to about 372849.94 milliwatts

Common Use Cases

Assessing automotive and motorcycle engine power in electrical terms
Specifying power ratings of electric motors, pumps, and small engines in milliwatts
Evaluating power consumption for audio amplifiers and portable devices
Measuring optical and RF output levels in communications and safety applications
Bridging mechanical horsepower ratings and electronic power specifications

Tips & Best Practices

Confirm the specific horsepower variant before converting to ensure accuracy
Use the converter for precise technical or engineering calculations when small scale power units are needed
Check large milliwatt values carefully for numerical precision in high-power conversions
Apply the conversion for comparing mechanical power to electrical power ratings

Limitations

Conversion is based on the common mechanical horsepower definition; other variants may yield different results
Resulting milliwatt values can be very large and require attention to numerical accuracy
Does not account for metric horsepower or other less common horsepower definitions

Frequently Asked Questions

What is horsepower in power measurements?: Horsepower (hp) is a non-SI unit of power representing the rate of doing work, typically defined as 550 foot-pounds per second or about 745.7 watts in the common mechanical variant.
Why convert horsepower to milliwatt?: Converting horsepower to milliwatt helps translate traditional mechanical power ratings into smaller-scale electrical power units useful in technical and engineering contexts.
Are all horsepower units the same?: No, there are different horsepower variants such as mechanical and metric horsepower, and this tool uses the common mechanical horsepower definition for conversion.

Key Terminology

Horsepower (hp, hp UK): A non-SI mechanical unit of power defined as 550 foot-pounds per second, roughly equivalent to 745.7 watts.
Milliwatt (mW): One thousandth of a watt, representing small power levels often used in electrical and optical measurements.
Power: The rate at which energy is transferred or converted, expressed in units such as watt, horsepower, or milliwatt.

Quick Knowledge Check

What does one horsepower approximately equal in milliwatts?

745.7 mW

745,699.87 mW

7,457 mW

What is a milliwatt?

One thousandth of a watt

One thousand watts

Equal to one horsepower

Which field commonly uses horsepower to specify power?

Automotive engineering

Culinary arts

Fashion design

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