What does joule/second/square meter measure?

It measures heat flux density, representing thermal energy flow rate per unit area in watts per square meter.

Why use horsepower per square foot instead of SI units?

Horsepower per square foot is preferred in some industries to express power density in familiar mechanical horsepower terms, especially for designing and rating thermal equipment.

How to Convert from Joule/second/square meter to Horsepower/square foot?

Q: How do I convert from joule/second/square meter to horsepower/square foot?

Multiply the joule/second/square meter value by 0.000124585 to get the equivalent horsepower per square foot.

Learn how to convert heat flux density measurements from joule/second/square meter (W·m⁻²) to horsepower/square foot (hp/ft²), understand their definitions, applications, and conversion formula.

Joule/second/square meter

Horsepower/square foot

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Joule/second/square meter to Horsepower/square foot Conversion Table

Joule/second/square meter	Horsepower/square foot

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Joule/second/square meter to Horsepower/square foot Conversion Table
Joule/second/square meter	Horsepower/square foot

Explore More Heat Flux Density Units Converter

What Is This Tool?

This converter allows you to change heat flux density values from joule/second/square meter, a standard SI unit, into horsepower per square foot, a non-SI unit commonly used in industrial thermal applications.

How to Use This Tool?

Enter the heat flux density value in joule/second/square meter.
Select the target unit as horsepower per square foot.
Click convert to see the equivalent heat flux density in horsepower/square foot.

Key Features

Converts heat flux density units between joule/second/square meter and horsepower/square foot.
Supports industry-relevant unit transformations for thermal power per area.
Provides clear examples of typical conversions.
Browser-based and easy to use for quick calculations.

Examples

1000 joule/second/square meter equals 0.124585 horsepower/square foot.
500 joule/second/square meter equals 0.0622925 horsepower/square foot.

Common Use Cases

Measuring solar irradiance to evaluate power per area on photovoltaic panels.
Quantifying heat loss through building insulation for thermal performance.
Rating burner or furnace heat input by grate area in combustion equipment.
Specifying radiant heat flux on materials during fire testing.
Designing solar thermal and radiant heater systems to express power density.

Tips & Best Practices

Double-check unit selections to ensure accurate conversions.
Use consistent mechanical horsepower definitions to avoid discrepancies.
Be mindful of the difference between square meters and square feet in area units.
Use the conversion tool to switch between international and legacy unit systems effectively.

Limitations

Horsepower per square foot is a non-SI unit and less common internationally.
Conversion requires attention to the different unit scales between metric and imperial.
Accuracy depends on using the standard mechanical horsepower value (~745.7 watts).
May require reporting in dual units to prevent confusion in global contexts.

Frequently Asked Questions

What does joule/second/square meter measure?: It measures heat flux density, representing thermal energy flow rate per unit area in watts per square meter.
Why use horsepower per square foot instead of SI units?: Horsepower per square foot is preferred in some industries to express power density in familiar mechanical horsepower terms, especially for designing and rating thermal equipment.
How do I convert from joule/second/square meter to horsepower/square foot?: Multiply the joule/second/square meter value by 0.000124585 to get the equivalent horsepower per square foot.

Key Terminology

Joule/second/square meter: A unit measuring heat flux density, equal to one watt per square meter, indicating energy flow rate per area.
Horsepower/square foot: A non-SI unit of heat flux density expressing power delivered or removed per square foot, based on mechanical horsepower.
Heat flux density: The rate of thermal energy transfer per unit surface area, also called irradiance.

Quick Knowledge Check

What physical quantity does joule/second/square meter represent?

Mechanical power per unit length

Heat flux density or thermal power per unit area

Energy stored per unit volume

What is a typical use case for horsepower per square foot?

Measuring gravitational force on surfaces

Rating heat input per grate area in furnaces

Calculating electrical resistance of wires

What is the conversion factor from joule/second/square meter to horsepower/square foot?

0.0124585

0.000124585

8.03×10³

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