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FOSSIL FUELS1. Barrel of oil equivalent (boe) = approx. 6.1 GJ (5.8 million Btu), equivalent to 1,700 kWh. "Petroleum barrel" is a liquid measure equal to 42 U.S. gallons (35 Imperial gallons or 159 liters); about 7.2 barrels oil are equivalent to one tonne of oil (metric) = 42-45 GJ. 2. Gasoline US gallon = 115,000 Btu = 121 MJ = 32 MJ/liter (Lower heating value LHV). US gallon = 125,000 Btu = 132 MJ = 35 MJ/liter (Higher heating value HHV)
3. Petro-diesel = 130,500 Btu/gallon (36.4 MJ/liter or 42.8 GJ/t)
4. Metric tonne coal = 27-30 GJ (bituminous/anthracite); 15-19 GJ (lignite/sub-bituminous) (the above ranges are equivalent to 11,500-13,000 Btu/lb and 6,500-8,200 Btu/lb). 5. Natural gas: HHV = 1027 Btu/ft3 = 38.3 MJ/m3; LHV = 930 Btu/ft3 = 34.6 MJ/m3
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