Convert joule/square metre to btu (it)/square foot

Please provide a value.
Please provide a value.

Joule/Square Metre

The joule per square metre (J/m²) is the SI unit of radiant exposure or heat density. It represents the total energy incident on or passing through a unit area. Used in solar radiation measurements, laser energy delivery, and thermal analysis to quantify energy flux integrated over time. 


Btu (IT)/Square Foot

The British thermal unit (IT) per square foot (Btu/ft²) is an imperial unit of heat density used in North American building energy analysis, fire protection engineering, and solar radiation assessment. One Btu/ft² equals approximately 11,356 J/m². 


Joule/Square Metre to Btu (IT)/Square Foot conversion table
Joule/Square MetreBtu (IT)/Square FootBtu (IT)/Square FootJoule/Square Metre
18.806E-05111356.5
20.0001761222713.1
30.0002642334069.6
50.0004403556782.6
100.000880610113565
200.001761120227131
250.0022013825283913
500.0044027550567826
1000.008805511001.13565E+06
2500.02201382502.83913E+06
5000.04402755005.67826E+06
10000.088055110001.13565E+07
How to convert Joule/Square Metre to Btu (IT)/Square Foot

1 J/m² = 8.806E-05 Btu/ft². To convert any value, multiply it by 8.806E-05. For example, 25 J/m² = 0.00220138 Btu/ft².

Frequently asked questions
How many Btu/ft² are there in one J/m²?
One J/m² is equal to 8.806E-05 Btu/ft².
How do you convert Joule/Square Metre to Btu (IT)/Square Foot?
Multiply the value in Joule/Square Metre by 8.806E-05 to get the result in Btu (IT)/Square Foot.
How much is 25 J/m² in Btu/ft²?
25 J/m² is equal to 0.00220138 Btu/ft².
How do you convert Btu (IT)/Square Foot back to Joule/Square Metre?
Divide by the same factor: multiply the value in Btu (IT)/Square Foot by 11356.5 to get Joule/Square Metre.

Most common heat density unit conversions