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

It measures the rate of heat transfer per second across one square foot of surface area using the International Table British thermal unit.

Why convert from Btu (IT)/s/ft² to Btu (th)/s/ft²?

Conversion ensures alignment of heat flux density measurements with different BTU definitions used in standards and engineering practices.

Is the conversion factor large between these units?

No, the factor is very close to 1, indicating minor differences between the two BTU unit definitions.

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

Learn how to convert heat flux density measurements from Btu (International Table)/second/square foot to Btu (thermochemical)/second/square foot using this simple guide and understand its common applications in engineering and fire testing.

Btu (IT)/second/square foot

Btu (th)/second/square foot

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

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

Btu (IT)/second/square foot	Btu (th)/second/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 (th)/second/square foot Conversion Table
Btu (IT)/second/square foot	Btu (th)/second/square foot

Explore More Heat Flux Density Units Converter

What Is This Tool?

This converter allows you to transform heat flux density values measured in Btu (IT)/second/square foot into Btu (th)/second/square foot. These units represent the rate of heat transfer per unit area according to different British thermal unit definitions used in scientific and engineering fields.

How to Use This Tool?

Enter the heat flux density value in Btu (IT)/second/square foot you want to convert.
Select the target unit as Btu (th)/second/square foot.
Click the convert button to obtain the equivalent value.
Review the result to apply in your engineering or scientific calculations.

Key Features

Converts between two British thermal unit-based heat flux density units.
Provides precise conversion aligned with standard engineering practices.
Supports applications in fire testing, HVAC design, and material evaluation.
Browser-based tool requiring no installation or registration.
Simple interface for quick and easy unit conversions.

Examples

Convert 5 Btu (IT)/s/ft² to Btu (th)/s/ft² to get approximately 5.00335 Btu (th)/s/ft².
Convert 10 Btu (IT)/s/ft² to Btu (th)/s/ft² resulting in about 10.00669 Btu (th)/s/ft².

Common Use Cases

Reporting radiative heat fluxes in fire resistance and fire exposure assessments.
Specifying heat loads in high-temperature furnace, laser, or plasma experiments.
Evaluating heat transfer through walls and insulation in HVAC and building energy studies.
Characterizing thermal protection materials and surface heat flux in materials testing.
Ensuring consistency in heat flux measurements across different BTU definitions in engineering.

Tips & Best Practices

Always confirm which British thermal unit definition your data uses before converting.
Use conversions to align measurements with relevant industry standards.
Consider the small difference in conversion factor relative to your application's precision needs.
Apply converted values carefully in heat transfer and fire testing calculations.
Double-check results for critical engineering decisions involving heat flux.

Limitations

The conversion factor between units is very close to 1, reflecting minor differences in energy definitions.
Such small differences might be negligible depending on measurement precision and use case.
This tool only applies to heat flux density expressed per second per square foot using British thermal unit definitions.
It does not convert to or from SI units directly.

Frequently Asked Questions

What does Btu (IT)/second/square foot measure?: It measures the rate of heat transfer per second across one square foot of surface area using the International Table British thermal unit.
Why convert from Btu (IT)/s/ft² to Btu (th)/s/ft²?: Conversion ensures alignment of heat flux density measurements with different BTU definitions used in standards and engineering practices.
Is the conversion factor large between these units?: No, the factor is very close to 1, indicating minor differences between the two BTU unit definitions.

Key Terminology

Btu (IT)/second/square foot: A heat flux density unit representing energy transfer per second per square foot using the International Table British thermal unit.
Btu (th)/second/square foot: A heat flux density unit using the thermochemical British thermal unit to express power per area in Imperial units.
Heat flux density: The rate of heat transfer per unit area, measured here in British thermal units per second per square foot.

Quick Knowledge Check

What quantity do Btu (IT)/s/ft² and Btu (th)/s/ft² measure?

Electrical power

Heat flux density

Pressure

One key use of converting Btu (IT)/s/ft² to Btu (th)/s/ft² is to:

Align temperature scales

Standardize heat flux measurements across BTU definitions

Convert from Imperial to metric units

The conversion factor between Btu (IT)/s/ft² and Btu (th)/s/ft² is:

Exactly 1

Slightly greater than 1

Significantly less than 1

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