Heat per Unit Area (HPA) units

Use the following table to convert among various units. To convert from the units in a column to the units in a row, divide by the conversion factor. To convert from the units in a row to the units in a column, multiply by the conversion factor. Four significant figures are shown. Only half the table is provided to avoid round-off errors.

 

 

J/ft2

kJ/m2

BTU/ft2

kcal/m2

cal/m2

J/ft2

1

 

 

 

 

kJ/m2

92.90

1

 

 

 

BTU/ft2

1055

11.35

1

 

 

kcal/m2

388.9

4.183

0.3686

1

 

cal/cm2

3889

41.83

3.686

10

1

Examples: multiply 2000 BTU/ft2 by 11.35 to get 22,700 kJ/m2; divide 20,000 kJ/m2 by 11.35 to get 1762 BTU/ft2.

 

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