What does horsepower [hp, hp (UK)] represent?

Horsepower is a traditional non-SI unit measuring power as the rate of work done, commonly defined as 550 foot-pounds per second or about 745.7 watts for the mechanical/imperial type.

Why convert horsepower to joule per second [J/s]?

Converting to joule per second, which equals watts, allows universal scientific comparison and standardization across different measurement systems.

Are all horsepower units the same for conversion?

No, there are variants like metric horsepower with different values, so specifying the exact horsepower type is important to maintain conversion accuracy.

Convert Horsepower [hp, hp (UK)] to Joule/second [J/s] Easily

Use this online tool to convert power measurements from horsepower [hp, hp (UK)] to joule per second [J/s], the SI unit of power. Learn about the conversion process, use cases, and common examples.

Horsepower [hp, hp (UK)]

Joule/second [J/s]

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Horsepower [hp, hp (UK)] to Joule/second [J/s] Conversion Table

Horsepower [hp, hp (UK)]	Joule/second [J/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 Joule/second [J/s] Conversion Table
Horsepower [hp, hp (UK)]	Joule/second [J/s]

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What Is This Tool?

This converter transforms power values expressed in horsepower [hp, hp (UK)], a traditional non-SI unit, into joule per second [J/s], the SI derived unit equivalent to watts. It helps translate common mechanical power ratings into the standardized metric system.

How to Use This Tool?

Enter the power value measured in horsepower [hp, hp (UK)]
Select the input unit as horsepower [hp, hp (UK)]
Choose the output unit as joule per second [J/s]
Initiate the conversion to obtain the corresponding power in joule per second
Review the result and apply it to your calculations or assessments

Key Features

Converts mechanical horsepower to joule per second with a precise conversion factor
Provides unit definitions and typical applications for better understanding
Includes examples demonstrating the conversion process
Supports power conversion useful for automotive, engineering, and industrial fields
Browser-based and easy to use without any installation

Examples

Convert 2 hp to joule per second: 2 × 745.6998715823 = 1491.3997431646 J/s
Convert 0.5 hp to joule per second: 0.5 × 745.6998715823 = 372.84993579115 J/s

Common Use Cases

Evaluating engine power ratings for vehicles and motorcycles
Specifying electric motor and pump power in product specifications
Comparing performance of marine engines, generators, and industrial machinery
Calculating electrical power consumption and mechanical power outputs
Analyzing heat transfer rates in HVAC and thermodynamic systems

Tips & Best Practices

Confirm the variant of horsepower used before converting to ensure accuracy
Use joule per second for standardized scientific and engineering calculations
Apply conversion for clearer comparisons across different power rating standards
Refer to conversion examples to validate your calculations
Keep in mind the non-SI nature of horsepower in interoperability scenarios

Limitations

Different horsepower variants exist with varying exact values; clarity on type is required
Horsepower being a non-SI unit may be less precise compared to joule per second
Conversion accuracy depends on use of the correct horsepower definition
May not suit scientific contexts requiring strict SI unit usage without clarifications
Does not cover metric or other horsepower variants beyond the common mechanical horsepower

Frequently Asked Questions

What does horsepower [hp, hp (UK)] represent?: Horsepower is a traditional non-SI unit measuring power as the rate of work done, commonly defined as 550 foot-pounds per second or about 745.7 watts for the mechanical/imperial type.
Why convert horsepower to joule per second [J/s]?: Converting to joule per second, which equals watts, allows universal scientific comparison and standardization across different measurement systems.
Are all horsepower units the same for conversion?: No, there are variants like metric horsepower with different values, so specifying the exact horsepower type is important to maintain conversion accuracy.

Key Terminology

Horsepower [hp, hp (UK)]: A non-SI unit of power representing the rate of doing work; mechanical/imperial horsepower equals 550 foot-pounds per second or roughly 745.7 watts.
Joule per second [J/s]: The SI derived unit of power equal to one joule of energy transferred per second; it is exactly equivalent to one watt.
Conversion Rate: The factor used to translate horsepower to joule per second is approximately 745.6998715823 J/s per 1 hp.

Quick Knowledge Check

What SI unit is equivalent to joule per second [J/s]?

Newton

Watt

Calorie

Which is a typical use of horsepower?

Specifying engine power

Measuring temperature

Describing time intervals

Why is clarity on horsepower type important?

Different types have different exact values

Because horsepower is SI

Horsepower is the same everywhere

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