Calorific Value

J/m3
them/ft3
kJ/m3
kcal/m3
Btu/ft3
Chu/ft3
MJ/m3

1 kcal/m3 (standard, saturated) = 1.0171 kcal/m3 (standard, dry)

1 kcal/m3 (standard, dry) = 1.0548 kcal/m3 (normal, dry)

1 MJ/m3 = 1 J/cm3

Wobbe index = GCV / √ Specific Gravity 

Specific Gravity = (density of gas / density of air) at standard conditions

Density of air (0°C, 1 atm) = 1.2928 g/L or kg/m3