What does Btu (th)/hour/square foot measure?

It measures heat flux density, representing the rate of heat transfer per unit area using thermochemical British thermal units per hour per square foot.

In which industries is this conversion commonly applied?

It is used in building energy modeling, HVAC design, solar energy engineering, industrial thermal processing, and climate science.

Is the conversion factor constant?

Yes, the tool uses the defined conversion rate of 1 Btu (th)/hour/square foot equals 3.1524810541 joule/second/square meter.

Convert Btu (th)/hour/square foot to Joule/second/square meter

Q: Why convert Btu (th)/hour/square foot to joule/second/square meter?

Converting to joule/second/square meter allows integration with SI units widely used in science, engineering, and international standards.

Easily convert heat flux density units from Btu (th)/hour/square foot to joule/second/square meter with this online unit converter tool designed for HVAC, building science, and thermal analysis.

Btu (th)/hour/square foot

Joule/second/square meter

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

Btu (th)/hour/square foot to Joule/second/square meter Conversion Table

Btu (th)/hour/square foot	Joule/second/square meter

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.

Btu (th)/hour/square foot to Joule/second/square meter Conversion Table
Btu (th)/hour/square foot	Joule/second/square meter

Explore More Heat Flux Density Units Converter

What Is This Tool?

This tool converts heat flux density values expressed in Btu (th)/hour/square foot to joule/second/square meter, allowing users to translate imperial HVAC and building science measurements into SI units relevant for science and engineering applications.

How to Use This Tool?

Enter the value measured in Btu (th)/hour/square foot into the input field
Select Btu (th)/hour/square foot as the input unit if not preselected
Choose joule/second/square meter as the output unit
Click the convert button to see the corresponding heat flux density in SI units
Review and utilize the converted results for analysis or reporting

Key Features

Converts heat flux density from Btu (th)/hour/square foot to joule/second/square meter
Supports use in building science, HVAC, solar energy, and industrial thermal contexts
Browser-based and easy to use without additional software
Uses an accurate conversion factor based on standard unit definitions
Helps compare and integrate data with international standards and metrics

Examples

5 Btu (th)/hour/square foot equals approximately 15.7624 joule/second/square meter
0.1 Btu (th)/hour/square foot converts to about 0.3152 joule/second/square meter

Common Use Cases

Expressing insulation heat loss or gain rates in building elements
Sizing HVAC systems by calculating heat transfer through windows, walls, and roofs
Reporting heat flux density in building tests and energy compliance protocols
Evaluating solar irradiance on photovoltaic and solar-thermal surfaces
Assessing thermal power in industrial furnaces and thermal processing
Conducting climate energy-balance and spacecraft thermal control studies

Tips & Best Practices

Always verify that the surface area units correspond when performing conversions
Confirm steady-state conditions before applying the conversion for consistent results
Use the tool to align measurements with international SI unit standards
Consider the context of the heat flux measurement to select appropriate units
Refer to conversion examples to validate input and output values

Limitations

The conversion assumes steady-state heat flux and standard unit definitions
Some minor rounding differences may exist due to unit definition precision
Accuracy depends on consistent use of surface area and time units during conversion

Frequently Asked Questions

What does Btu (th)/hour/square foot measure?: It measures heat flux density, representing the rate of heat transfer per unit area using thermochemical British thermal units per hour per square foot.
Why convert Btu (th)/hour/square foot to joule/second/square meter?: Converting to joule/second/square meter allows integration with SI units widely used in science, engineering, and international standards.
In which industries is this conversion commonly applied?: It is used in building energy modeling, HVAC design, solar energy engineering, industrial thermal processing, and climate science.
Is the conversion factor constant?: Yes, the tool uses the defined conversion rate of 1 Btu (th)/hour/square foot equals 3.1524810541 joule/second/square meter.

Key Terminology

Btu (th)/hour/square foot: A heat flux density unit quantifying thermochemical British thermal unit heat transfer per hour through one square foot.
Joule/second/square meter: An SI unit of heat flux density representing heat flow rate in watts per square meter.
Heat Flux Density: The rate of heat transfer per unit area across a surface.
HVAC: Heating, Ventilation, and Air Conditioning—systems related to thermal comfort and air quality management.

Quick Knowledge Check

What unit does Btu (th)/hour/square foot measure?

Electric current per area

Heat flux density

Velocity per time

What is equivalent to 1 joule/second/square meter?

One watt per square meter

One kilowatt per square foot

One thermal unit per square inch

Which application commonly uses this unit conversion?

Assessing sound intensity levels

Sizing HVAC loads for buildings

Measuring electrical resistance

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