Convert Joule per Square Meter to IT BTU per Square Foot
Live bidirectional calculator for Joules per Square Meter (J/m²) and IT BTUs per Square Foot (Btu_IT/ft²) with verified formula and conversion charts.
Heat Density5 units
How the Calculation Works (Linear Scaling)
Since 1 IT BTU per Square Foot = 11356.526682 Joules per Square Meter, divide the value in Joules per Square Meter by 11356.526682.
Joule per Square Meter to IT BTU per Square Foot Conversion Table
Precomputed values for quick reference and printing.
| Joule per Square Meter | IT BTU per Square Foot |
|---|---|
| 1 J/m² | 8.8055e-5 Btu_IT/ft² |
| 2 J/m² | 0.0002 Btu_IT/ft² |
| 3 J/m² | 0.0003 Btu_IT/ft² |
| 4 J/m² | 0.0004 Btu_IT/ft² |
| 5 J/m² | 0.0004 Btu_IT/ft² |
| 6 J/m² | 0.0005 Btu_IT/ft² |
| 7 J/m² | 0.0006 Btu_IT/ft² |
| 8 J/m² | 0.0007 Btu_IT/ft² |
| 9 J/m² | 0.0008 Btu_IT/ft² |
| 10 J/m² | 0.0009 Btu_IT/ft² |
| 15 J/m² | 0.0013 Btu_IT/ft² |
| 20 J/m² | 0.0018 Btu_IT/ft² |
| 25 J/m² | 0.0022 Btu_IT/ft² |
| 30 J/m² | 0.0026 Btu_IT/ft² |
| 40 J/m² | 0.0035 Btu_IT/ft² |
| 50 J/m² | 0.0044 Btu_IT/ft² |
| 75 J/m² | 0.0066 Btu_IT/ft² |
| 100 J/m² | 0.0088 Btu_IT/ft² |
| IT BTU per Square Foot | Joule per Square Meter |
|---|---|
| 1 Btu_IT/ft² | 11356.5267 J/m² |
| 2 Btu_IT/ft² | 22713.0534 J/m² |
| 3 Btu_IT/ft² | 34069.58 J/m² |
| 4 Btu_IT/ft² | 45426.1067 J/m² |
| 5 Btu_IT/ft² | 56782.6334 J/m² |
| 6 Btu_IT/ft² | 68139.1601 J/m² |
| 7 Btu_IT/ft² | 79495.6868 J/m² |
| 8 Btu_IT/ft² | 90852.2135 J/m² |
| 9 Btu_IT/ft² | 102208.7401 J/m² |
| 10 Btu_IT/ft² | 113565.2668 J/m² |
| 15 Btu_IT/ft² | 170347.9002 J/m² |
| 20 Btu_IT/ft² | 227130.5336 J/m² |
| 25 Btu_IT/ft² | 283913.1671 J/m² |
| 30 Btu_IT/ft² | 340695.8005 J/m² |
| 40 Btu_IT/ft² | 454261.0673 J/m² |
| 50 Btu_IT/ft² | 567826.3341 J/m² |
| 75 Btu_IT/ft² | 851739.5012 J/m² |
| 100 Btu_IT/ft² | 1135652.6682 J/m² |
About Joule per Square Meter (J/m²)
The SI unit of surface heat density or radiant exposure, representing 1 joule of thermal or radiant energy accumulated per square meter of surface area.
History: Codified in radiometry and heat transfer as radiant exposure (H) and area energy density.
Common Uses: Solar insolation daily totals, laser pulse fluence, thermal radiation surface absorption.
About IT BTU per Square Foot (Btu_IT/ft²)
The US customary unit of heat density, defined as 1 IT BTU per square foot (≈ 11,356.53 J/m²).
History: Standard US engineering measure for cumulative solar irradiance and thermal energy absorption per unit area.
Common Uses: US solar collector daily gain calculations, building envelope thermal exposure.
❓ Frequently Asked Questions
How many IT BTUs per Square Foot are in 1 Joule per Square Meter?
There are exactly 0.000088 IT BTUs per Square Foot in 1 Joule per Square Meter (1 J/m² = 0.000088 Btu_IT/ft²).
What is the formula to convert Joule per Square Meter to IT BTU per Square Foot?
The formula is: IT BTU per Square Foot = Joule per Square Meter / 11356.526682. Since 1 IT BTU per Square Foot = 11356.526682 Joules per Square Meter, divide the value in Joules per Square Meter by 11356.526682.
How do I convert 1 J/m² to Btu_IT/ft² manually?
To convert 1 J/m² to Btu_IT/ft²: apply the formula IT BTU per Square Foot = Joule per Square Meter / 11356.526682. Substituting gives: 1 / 11356.526682 = 0.0001 Btu_IT/ft².