What is the conversion rate between these units?

One Btu (IT)/second/square foot equals approximately 3600 Btu (IT)/hour/square foot.

Can this conversion be used for fluctuating heat flux measurements?

No, the conversion assumes a steady heat flux; transient or varying fluxes require more advanced analysis methods.

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

Q: Why convert from Btu (IT)/second/square foot to Btu (IT)/hour/square foot?

Converting to hourly units helps express heat flux in terms suitable for building energy evaluations and thermal transmittance assessments used in construction.

Learn how to convert heat flux density values from Btu (IT) per second per square foot to Btu (IT) per hour per square foot, a useful process for building energy assessments and fire safety evaluations.

Btu (IT)/second/square foot

Btu (IT)/hour/square foot

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

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

Btu (IT)/second/square foot	Btu (IT)/hour/square foot

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

Explore More Heat Flux Density Units Converter

What Is This Tool?

This unit converter transforms heat flux density measurements from Btu (IT) per second per square foot to Btu (IT) per hour per square foot, enabling alignment of high-rate thermal power values with longer-term energy transfer rates.

How to Use This Tool?

Input the heat flux density value in Btu (IT)/second/square foot
Select the desired output unit as Btu (IT)/hour/square foot
Click convert to get the equivalent heat flux density value
Interpret the result for building energy calculations or fire safety analysis

Key Features

Converts thermal power rate per unit area between second-based and hour-based Btu (IT) units
Supports heat flux evaluations in fire testing, building energy codes, and materials testing
Simplifies expressing heat transfer rates for HVAC design and insulation performance
Browser-based and easy to use without software installation

Examples

2 Btu (IT)/second/square foot converts to 7200 Btu (IT)/hour/square foot
0.5 Btu (IT)/second/square foot converts to 1800 Btu (IT)/hour/square foot

Common Use Cases

Aligning extreme heat flux values from fire testing with building energy code requirements
Calculating thermal transmittance (U-values) for walls, roofs, and windows
Sizing heating and cooling equipment by assessing heat loss or gain through building envelopes
Evaluating insulation materials in furnace, laser, or plasma heating experiments

Tips & Best Practices

Ensure heat flux is relatively steady over the conversion period for accurate interpretation
Use the conversion to relate instantaneous thermal measurements to hourly building codes
Consider environmental and surface conditions when applying converted values
Combine with insulation performance data to optimize material selections

Limitations

Assumes constant heat flux during the conversion interval; fluctuating fluxes need more detailed analysis
Surface properties and environmental factors can influence accuracy of converted results
Btu (IT) units are non-SI and may restrict interoperability with exclusively SI-based systems

Frequently Asked Questions

Why convert from Btu (IT)/second/square foot to Btu (IT)/hour/square foot?: Converting to hourly units helps express heat flux in terms suitable for building energy evaluations and thermal transmittance assessments used in construction.
What is the conversion rate between these units?: One Btu (IT)/second/square foot equals approximately 3600 Btu (IT)/hour/square foot.
Can this conversion be used for fluctuating heat flux measurements?: No, the conversion assumes a steady heat flux; transient or varying fluxes require more advanced analysis methods.

Key Terminology

Btu (IT)/second/square foot: A non-SI heat flux density unit representing the transfer of one British thermal unit (International Table) per second across each square foot of surface area.
Btu (IT)/hour/square foot: A heat flux density unit indicating how many British thermal units (International Table) are transferred per hour across each square foot of surface area, measuring thermal transmittance.
Thermal transmittance (U-value): A measure of the rate of heat transfer through a building envelope component, expressed in Btu (IT)/hour/square foot.

Quick Knowledge Check

What does the unit Btu (IT)/second/square foot measure?

Thermal transmittance over an hour

Heat flux density representing energy transfer per second per area

Heat loss in building materials

What is the approximate conversion factor from Btu (IT)/second/square foot to Btu (IT)/hour/square foot?

3600

0.0278

In which applications is this unit conversion commonly used?

Fire safety engineering and building energy modeling

Measuring electrical resistance

Calculating sound decibel levels

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