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Well, I'll use the same measure from the old method:

## Calculation

• Window Size = 9 px = 1.5 meters
• Tree = 246 px = 41 meters
• Fireblast = 182 Px = 746 meters

Now the serious buisness:

• V = 108689000 m3*(20,9%; it's the pourcentage of oxygen in air)
• V = 22716001 m3
• I am going to Convert m3 to Gallons so:
• V = 4996821664.331 gal
• So multiply by 418000 and divisions by 32 So:
• E = (4996821664.331 * 418000) / 32
• E = 6.53E+13 J - 15 Kiloton - Town level

## Executor N0's version

I am going to Convert m3 to Gallons so:
V = 4996821664.331 gal
So multiply by 418000 and divisions by 32 So:
E = (4996821664.331 * 418000) / 32
E = 6.53E+13 J - 15 Kiloton - Town level

Is this the same thing that you did here ?. It's wrong.

 “ Fire is hot because the conversion of the weak double bond in molecular oxygen, O2, to the stronger bonds in the combustion products carbon dioxide and water releases energy (418 kJ per 32 g of O2) „ ~ Wikipedia

It's don't say gallons, but g of grams. If you look to the source is from a book that's named as "Why Combustions Are Always Exothermic, Yielding About 418 kJ per Mole of O2". A mole of O2 is 32 grams (A mole of a atom or a molecule is the number of atoms or molecules where the total mass is equal to the total atomic/molecular mass.

So... O2 density is about 1.3311~1.42902 kg/m³. I'll use a low-end.

Mass = 22716001 m³ * 1.3311 kg/m³ = 30237268.9 kg = 30237268900 g

• 418kj = 32 grams of O2
• x kj = 30237268900 g

x kj = 3.94974325e11 kj

Energy = 3.94974325e+14 Joules, Town Level.

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