What does joule per second measure?

Joule per second (J/s) is the SI derived unit of power measuring the rate of energy transfer, which is equivalent to one watt.

Why convert joule per second to horsepower?

Converting J/s to horsepower helps translate power values into imperial units typically used for rating engines, small motors, and mechanical equipment.

Is horsepower exactly equal to watts?

No, mechanical horsepower (550 ft*lbf/s) is approximately 745.699872 watts and serves as an approximate unit for power measurement in imperial units.

Convert Joule/second (J/s) to Horsepower (550 ft*lbf/s) Easily

Use this online converter to quickly change power values from joule per second (J/s) to mechanical horsepower (550 ft*lbf/s). Ideal for automotive, small engine, and mechanical applications needing imperial power units.

Joule/second [J/s]

Horsepower (550 ft*lbf/s)

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

Joule/second [J/s] to Horsepower (550 ft*lbf/s) Conversion Table

Joule/second [J/s]	Horsepower (550 ft*lbf/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

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Interval

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Joule/second [J/s] to Horsepower (550 ft*lbf/s) Conversion Table
Joule/second [J/s]	Horsepower (550 ft*lbf/s)

Explore More Power Units Converter

What Is This Tool?

This tool converts power measurements from joule per second (J/s), an SI derived unit equivalent to watts, into horsepower (550 ft*lbf/s), a commonly used imperial power unit especially in automotive and mechanical contexts.

How to Use This Tool?

Enter the power value in joule per second (J/s) into the input field
Select or confirm the input unit is joule/second [J/s]
Choose horsepower (550 ft*lbf/s) as the output unit
Click the convert button to get the equivalent horsepower value
Review the result and use it for your mechanical or automotive calculations

Key Features

Convert power from joule/second (J/s) to horsepower (550 ft*lbf/s) instantly
Simple and easy-to-use interface suitable for all users
Browser-based tool requiring no installation
Provides clear examples for quick understanding
Supports power conversions relevant to engines, motors, and pumps

Examples

100 J/s = 100 × 0.0013410221 = 0.1341 Horsepower (550 ft*lbf/s)
1000 J/s = 1000 × 0.0013410221 = 1.341 Horsepower (550 ft*lbf/s)

Common Use Cases

Translating SI power units for engine power ratings in cars and motorcycles
Determining power ratings of small engines like lawnmowers and portable generators
Comparing pump, compressor, and motor power in imperial-based engineering contexts

Tips & Best Practices

Always verify the unit type before conversion to ensure accuracy
Use this tool primarily for practical engineering or automotive power comparisons
Be aware of different horsepower definitions to avoid mixing units
Double-check results if precision is critical, as horsepower is an approximate measure

Limitations

Horsepower (550 ft*lbf/s) is an approximate imperial unit and may lack scientific precision
This conversion applies specifically to the mechanical horsepower defined by James Watt
Different horsepower definitions (like metric horsepower) are not covered by this converter

Frequently Asked Questions

What does joule per second measure?: Joule per second (J/s) is the SI derived unit of power measuring the rate of energy transfer, which is equivalent to one watt.
Why convert joule per second to horsepower?: Converting J/s to horsepower helps translate power values into imperial units typically used for rating engines, small motors, and mechanical equipment.
Is horsepower exactly equal to watts?: No, mechanical horsepower (550 ft*lbf/s) is approximately 745.699872 watts and serves as an approximate unit for power measurement in imperial units.

Key Terminology

Joule per second (J/s): An SI derived unit of power representing one joule of energy transferred per second, equivalent to one watt.
Horsepower (550 ft*lbf/s): An imperial power unit equal to 550 foot-pound-force per second, approximately 745.7 watts, commonly used to specify mechanical power.

Quick Knowledge Check

What is the SI unit equivalent of one joule per second?

Horsepower

Watt

Foot-pound-force

The mechanical horsepower (550 ft*lbf/s) is approximately how many watts?

745.7 watts

1000 watts

550 watts

Which of the following is a common use of horsepower in this context?

Rating electric bulbs

Evaluating car engine power

Measuring heat transfer rates

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