What is the difference between horsepower and watt?

Horsepower is a non-SI unit of power primarily related to mechanical work rates, while watt is the SI derived unit measuring the rate of energy transfer or conversion.

Why convert horsepower to watts?

Converting to watts standardizes power measurements, facilitating comparison and integration in scientific, engineering, and international contexts.

Are all horsepower types the same?

No. Different types exist, such as mechanical/imperial horsepower and metric horsepower, each with slightly different conversion values to watts.

How to Convert Horsepower (hp, hp UK) to Watt (W)

Learn how to convert horsepower (hp, hp UK), a common non-SI power unit, to watts (W), the SI unit for power measurement. Understand the definition, uses, and key examples of this conversion.

Horsepower [hp, hp (UK)]

Watt [W]

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

Horsepower [hp, hp (UK)] to Watt [W] Conversion Table

Horsepower [hp, hp (UK)]	Watt [W]

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 Watt [W] Conversion Table
Horsepower [hp, hp (UK)]	Watt [W]

Explore More Power Units Converter

What Is This Tool?

This converter helps you change power values from horsepower (hp, including the UK variant) to watts (W). Horsepower is a non-SI unit often used for measuring engine and motor power, while watt is the SI unit that quantifies power as energy transferred per second.

How to Use This Tool?

Enter the power value in horsepower (hp or hp UK)
Select the unit 'horsepower [hp, hp (UK)]' as the input
Choose 'watt [W]' as the output unit
Click convert to see the equivalent power in watts
Review the output value and use it for engineering or comparison purposes

Key Features

Converts mechanical horsepower (hp, hp UK) to SI watt (W)
Uses the exact conversion factor 1 hp = 745.6998715823 W
Includes examples demonstrating typical conversions
Supports power measurement in automotive, electrical, and industrial contexts
Browser-based and easy to use for quick calculations

Examples

2 horsepower equals 2 × 745.6998715823 W = 1491.3997431646 W
0.5 horsepower equals 0.5 × 745.6998715823 W = 372.84993579115 W

Common Use Cases

Translating engine power specifications from horsepower to watts in automotive manufacturing
Specifying power ratings for electric motors, pumps, and small machines in technical datasheets
Comparing performance of marine and industrial engines where horsepower is commonly used
Analyzing electrical device power consumption and output using the SI unit watt

Tips & Best Practices

Confirm the type of horsepower variant used before converting to ensure accuracy
Round the converted watt value appropriately for practical applications
Use watts when communicating power in scientific or internationally standardized contexts
Keep in mind some industries may still use horsepower for traditional measurements

Limitations

Various horsepower variants exist, so conversion accuracy depends on the specific type selected
The conversion factor has many decimal places, which may require rounding
Some fields continue using horsepower instead of watts for regulatory or traditional reasons

Frequently Asked Questions

What is the difference between horsepower and watt?: Horsepower is a non-SI unit of power primarily related to mechanical work rates, while watt is the SI derived unit measuring the rate of energy transfer or conversion.
Why convert horsepower to watts?: Converting to watts standardizes power measurements, facilitating comparison and integration in scientific, engineering, and international contexts.
Are all horsepower types the same?: No. Different types exist, such as mechanical/imperial horsepower and metric horsepower, each with slightly different conversion values to watts.

Key Terminology

Horsepower (hp, hp UK): A non-SI unit of power defined as 550 foot-pounds per second, approximately equal to 745.7 watts.
Watt (W): The SI derived unit of power representing energy transfer rate of one joule per second.
Conversion Rate: The factor used to translate one unit into another, here 1 horsepower equals 745.6998715823 watts.

Quick Knowledge Check

What unit does horsepower measure?

Energy

Power

Force

What is the SI derived unit for power?

Watt

Horsepower

Newton

Why is converting horsepower to watts useful?

To standardize power ratings

To measure distance

To define weight

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