What is a Btu (th)/second/square foot?

It is a unit of heat flux density that measures one British thermal unit (thermochemical) of energy transferred per second across one square foot of area, commonly used in engineering and building science.

Are these units part of the SI system?

No, both units are not SI standard. For modern applications, heat flux is often given in watts per square meter as part of the SI system.

How to Convert from Btu (th)/second/square foot to Calorie (th)/hour/square centimeter?

Q: Why convert Btu (th)/second/square foot to calorie (th)/hour/square centimeter?

This conversion helps express heat flux measurements in different unit systems, especially moving from Imperial units typical in building science to thermochemical calories often used in laboratory calorimetry and heat-exposure testing.

Learn how to convert heat flux density measurements from Btu (th)/second/square foot to calorie (th)/hour/square centimeter with this easy-to-use unit converter designed for HVAC, building science, and laboratory applications.

Btu (th)/second/square foot

Calorie (th)/hour/square centimeter

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Btu (th)/second/square foot to Calorie (th)/hour/square centimeter Conversion Table

Btu (th)/second/square foot	Calorie (th)/hour/square centimeter

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)/second/square foot to Calorie (th)/hour/square centimeter Conversion Table
Btu (th)/second/square foot	Calorie (th)/hour/square centimeter

Explore More Heat Flux Density Units Converter

What Is This Tool?

This converter transforms heat flux density values from the unit Btu (th)/second/square foot to calorie (th)/hour/square centimeter. It facilitates expressing heat flow rates per area, useful in engineering, building science, and thermal testing environments.

How to Use This Tool?

Enter the heat flux value in Btu (th)/second/square foot
Select the target unit as calorie (th)/hour/square centimeter
Click convert to obtain the equivalent value in the desired unit

Key Features

Converts heat flux density between Imperial and thermochemical calorie units
Supports applications in HVAC, building envelope energy calculations, and thermal system design
Helps quantify radiative and convective heat loads on surfaces and equipment
Useful for laboratory calorimetry and small-area heat flux measurements
Browser-based and easy to use for quick heat flux unit conversions

Examples

2 Btu (th)/second/square foot equals approximately 1952.97 calorie (th)/hour/square centimeter
0.5 Btu (th)/second/square foot equals about 488.24 calorie (th)/hour/square centimeter

Common Use Cases

Expressing heat transfer through walls and insulation in building science using different unit systems
Designing thermal systems requiring heat load calculations on ducts and furnace surfaces
Measuring surface heat flux in fire-exposure testing and material flammability studies
Conducting laboratory calorimetry and small-scale heat-flux assessments for coatings or materials
Reporting solar irradiance or insolation on small surfaces in historical or engineering literature

Tips & Best Practices

Ensure consistent use of time and area units to avoid calculation errors
Double-check unit definitions since thermochemical units may vary slightly in precision
When possible, prefer SI units for heat flux density to align with modern standards
Use the exact conversion formula to maintain accuracy when switching between unit systems
Be cautious when comparing results due to differences in unit scales and measurement times

Limitations

Conversions depend on precise thermochemical unit definitions and may vary with standards
Units vary in time basis and area scale, requiring careful attention in interpretation
Not SI standard units, so modern engineering work often prefers watts per square meter
Smaller area units and longer time periods in the calorie unit may lead to confusion
Accuracy relies on proper unit consistency throughout calculations and reporting

Frequently Asked Questions

What is a Btu (th)/second/square foot?: It is a unit of heat flux density that measures one British thermal unit (thermochemical) of energy transferred per second across one square foot of area, commonly used in engineering and building science.
Why convert Btu (th)/second/square foot to calorie (th)/hour/square centimeter?: This conversion helps express heat flux measurements in different unit systems, especially moving from Imperial units typical in building science to thermochemical calories often used in laboratory calorimetry and heat-exposure testing.
Are these units part of the SI system?: No, both units are not SI standard. For modern applications, heat flux is often given in watts per square meter as part of the SI system.

Key Terminology

Heat Flux Density: The rate of heat energy transfer per unit area, often measured in power per area units.
Btu (th)/second/square foot: An Imperial unit measuring heat flux density as British thermal units (thermochemical) of energy transferred per second across one square foot.
Calorie (th)/hour/square centimeter: A thermochemical calorie-based unit measuring heat flux density as calories transferred per hour over one square centimeter of area.

Quick Knowledge Check

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

Energy per unit volume

Heat flux density as energy per time per area

Temperature difference across a material

Which unit does this tool convert to?

Calorie (th)/hour/square centimeter

Watt per square meter

Joule per second

Why must you be cautious when using these unit conversions?

Because unit scales and time bases differ between units

Because these units are SI standard

Because conversion formulas are not fixed

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