Convert joule/square meter to btu (th)/square foot

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Vice Versa: btu (th)/square foot to joule/square meter

Joule/Square Meter

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 (th)/Square Foot

The thermochemical British thermal unit per square foot (Btu(th)/ft²) uses the thermochemical BTU (1054.35 J) to express heat density. Slightly different from the IT version, it is applied in thermochemical research and precise calorimetric measurements of radiant heat exposure. 


Joule/Square Meter to Btu (th)/Square Foot conversion table
Joule/Square MeterBtu (th)/Square Foot
18.811E-05
20.0001762
50.0004406
100.0008811
250.00220285
500.0044057
1000.0088114
5000.044057
10000.088114

Most common heat density unit conversions
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