What is horsepower in power measurement?

Horsepower (hp) is a non-SI unit measuring the rate of doing work, often defined as 550 foot-pounds per second, approximately 745.7 watts for the mechanical/imperial variant.

Why convert horsepower to millijoule per second?

Converting horsepower to millijoule per second translates conventional mechanical power into a precise unit useful for analyzing low-power systems and scientific experiments.

Are there variations in horsepower definitions affecting conversions?

Yes, there are several horsepower variants like mechanical and metric, each with slightly different values, impacting the exact conversion results.

How to Convert from Horsepower [hp, hp (UK)] to Millijoule/second [mJ/s]?

Learn how to convert power measurements from horsepower (common mechanical/imperial) to millijoule per second, a unit suitable for fine-scale energy transfer analysis.

Horsepower [hp, hp (UK)]

Millijoule/second [mJ/s]

Please check your input. It must be a valid numeric value.

Horsepower [hp, hp (UK)] to Millijoule/second [mJ/s] Conversion Table

Horsepower [hp, hp (UK)]	Millijoule/second [mJ/s]

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

Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.

Interval

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

Horsepower [hp, hp (UK)] to Millijoule/second [mJ/s] Conversion Table
Horsepower [hp, hp (UK)]	Millijoule/second [mJ/s]

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What Is This Tool?

This converter allows you to translate power values from horsepower (hp, hp (UK)), a traditional mechanical unit, into millijoule per second (mJ/s), a small-scale scientific unit of power equal to a thousandth of a watt.

How to Use This Tool?

Enter the numerical value in horsepower you wish to convert.
Select horsepower (hp, hp (UK)) as the input unit.
Choose millijoule per second (mJ/s) as the output unit.
Click the convert button to obtain the equivalent power in millijoule per second.
Review the result showing the converted value in mJ/s for your application.

Key Features

Converts horsepower (mechanical/imperial variant) to millijoule per second.
Browser-based and easy to use for quick power unit conversions.
Supports translating conventional mechanical power ratings into scientific units.
Provides accurate conversion based on a defined conversion rate.
Ideal for applications ranging from automotive power to low-power electronics.

Examples

2 horsepower equals approximately 1,491,399.743 millijoule per second.
0.5 horsepower converts to about 372,849.936 millijoule per second.

Common Use Cases

Rating automotive and motorcycle engines in mechanical units then analyzing using small-scale energy units.
Specifying power for electric motors, pumps, and small engines in a scientific and precise manner.
Assessing power consumption and output in low-power electronic devices and laboratory equipment.
Measuring heat and energy release rates in microscale thermal and biochemical research.

Tips & Best Practices

Ensure consistent use of the mechanical horsepower variant for accurate conversion.
Apply this conversion mainly when precise, small-scale power measurements are needed.
Use the tool to compare conventional power units with those used in electronics and lab settings.
Be mindful that large horsepower inputs lead to very large millijoule per second outputs which may require careful interpretation.

Limitations

Different horsepower variants (metric vs mechanical) cause conversion differences.
Millijoule per second is typically intended for low-power values, so results from large horsepower inputs can be very large and less practical.
Accuracy depends on the consistent definition of horsepower to avoid conversion mistakes.

Frequently Asked Questions

What is horsepower in power measurement?: Horsepower (hp) is a non-SI unit measuring the rate of doing work, often defined as 550 foot-pounds per second, approximately 745.7 watts for the mechanical/imperial variant.
Why convert horsepower to millijoule per second?: Converting horsepower to millijoule per second translates conventional mechanical power into a precise unit useful for analyzing low-power systems and scientific experiments.
Are there variations in horsepower definitions affecting conversions?: Yes, there are several horsepower variants like mechanical and metric, each with slightly different values, impacting the exact conversion results.

Key Terminology

Horsepower (hp, hp (UK)): A non-SI unit of power expressing the rate of doing work; common mechanical horsepower equals 550 foot-pounds per second or roughly 745.7 watts.
Millijoule per second (mJ/s): A unit of power equal to one-thousandth of a watt, used to measure the rate at which energy is transferred or dissipated, especially in low-power devices.

Quick Knowledge Check

What does one horsepower (mechanical/imperial) approximately equal in millijoule per second?

About 735,500 mJ/s

About 745,700 mJ/s

About 550,000 mJ/s

Which unit best suits measuring low-power systems?

Horsepower

Millijoule per second

Foot-pounds per second

One practical limitation when converting large horsepower to millijoule/second is:

Conversion precision is higher

Results become very large and less practical

Uses less common units

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