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

It measures the rate of heat transfer per unit area, specifically one International Table British thermal unit transferred per hour across one square foot of surface.

Why convert to joule/second/square meter?

Converting to joule/second/square meter provides a heat flux density measure compatible with SI units, facilitating international standards compliance and scientific analysis.

Can this conversion be used for transient heat flow?

No, the conversion assumes steady-state heat flux and does not account for transient thermal conditions.

How to Convert from Btu (IT)/hour/square foot to Joule/second/square meter

Learn how to convert heat flux density units from Btu (IT)/hour/square foot to joule/second/square meter with clear explanations, use cases, and examples.

Btu (IT)/hour/square foot

Joule/second/square meter

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

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

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

Explore More Heat Flux Density Units Converter

What Is This Tool?

This converter helps you change measurements of heat flux density from Btu (IT) per hour per square foot into joule per second per square meter, enabling conversion of thermal transmittance values into SI units suitable for scientific and engineering analysis.

How to Use This Tool?

Enter the numerical value of heat flux density in Btu (IT)/hour/square foot.
Select the input unit as Btu (IT)/hour/square foot and the output unit as joule/second/square meter.
Click the convert button to get the equivalent heat flux density in joule/second/square meter.
Review the converted result and use it for your application.

Key Features

Converts heat flux density between Btu (IT)/hour/square foot and joule/second/square meter.
Supports building energy code compliance and HVAC-related calculations.
Enables consistent unit use for thermal performance and energy modeling.
Offers example conversions for ease of understanding.
Browser-based and user-friendly interface.

Examples

2 Btu (IT)/hour/square foot converts to approximately 6.31 joule/second/square meter.
5 Btu (IT)/hour/square foot converts to about 15.77 joule/second/square meter.

Common Use Cases

Expressing U-values of walls, roofs, and windows in building energy standards.
Sizing heating and cooling requirements and calculating heat loss through building envelopes.
Evaluating solar irradiance on photovoltaic and solar-thermal collectors.
Assessing radiative heat flux in industrial furnaces and spacecraft thermal control.
Comparing insulation performance by relating to R-values for materials.

Tips & Best Practices

Ensure you enter steady-state heat flux values for accurate conversions.
Confirm you are using the International Table Btu definition (Btu (IT)).
Verify surface area measurements to match the unit specifications.
Use the converted values for consistent comparisons in scientific and engineering contexts.

Limitations

Conversion assumes steady-state heat flow and does not consider transient thermal effects.
Differences in Btu unit variants may cause inaccuracies if not properly accounted for.
Accuracy relies on precise measurement of surface area and consistent unit definitions.

Frequently Asked Questions

What does Btu (IT)/hour/square foot measure?: It measures the rate of heat transfer per unit area, specifically one International Table British thermal unit transferred per hour across one square foot of surface.
Why convert to joule/second/square meter?: Converting to joule/second/square meter provides a heat flux density measure compatible with SI units, facilitating international standards compliance and scientific analysis.
Can this conversion be used for transient heat flow?: No, the conversion assumes steady-state heat flux and does not account for transient thermal conditions.

Key Terminology

Btu (IT)/hour/square foot: A unit measuring heat flux density equal to one International Table British thermal unit transferred per hour per square foot surface area.
Joule/second/square meter: A unit measuring heat flow rate per unit area, equivalent to one watt per square meter.
Heat flux density: The rate of heat energy transfer per unit surface area.

Quick Knowledge Check

What heat flux density unit does 1 Btu (IT)/hour/square foot convert into?

Watt per square foot

Joule/second/square meter

Calorie per second per square meter

Which use case involves evaluating solar power per unit area?

Measuring solar irradiance on photovoltaic panels

Sizing insulation R-values

Calculating steady state heat loss in furnaces

What limitation should you consider during this conversion?

Accuracy depends on transient heat flow

It assumes steady-state conditions

It applies only to metric units

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