The Energy Blog Technical Reference Page
A collection of things you might find useful.
Energy Unit Conversions
 1 BTU = 1055 Joules
 1 BTU = 252 calories
 1 BTU = Amount in 1 Wood Match
 1 KWH = 3414 BTU
 1 KW = 56.9 BTU/Minute
 1 Watt = 3.414 BTU/Hour
 1 Watt = One Joule per second
 1 Watt = 10 Ergs per second
 1 Horsepower = 745 Watts
 1 Horsepower = 2,543 BTUs per Hour
 1 Horsepower = 550 ft/lbs per sec
 1 Horsepower = 33000 ft/lbs per minute
 1 Horsepower = 178.2 Calories/Second
 1 Horsepower = 10,692 Calories/Minute
 1 U.S. gallon has 231 cubic inches or 3.785 liters.
Energy content of some fuels
 1 Gallon of Gasoline contains 124,000 BTUs
 1 Gallon of E85 Ethanol contains 84,400 BTUs (72% of gasoline)
 1 Gallon of Methanol contains 62,800 BTUs
 1 Gallon of Fuel Oil (Heating) contains 140,000 BTUs
 1 Gallon of LNG contains 75,000 BTUs
 1 Ton of coal contains 16,000,000 to 26,000,000 BTUs
 100 Cubic Feet of Natural Gas (Therm) contains 100,000 BTUs
 100 Cubic Feet of Hydrogen contains 32,500 BTUs
 100 Cubic Feet of Propane contains 250,000 BTUs
 1 Kilogram of Hydrogen contains 125,000 BTUs
 1 Kilogram of hydrogen is 11.1 Cubic Meters (392 Cu Ft) at atm pressure.
 1 Cord of Hardwood Contains 24,000,000 BTUs
 1 Cord of Softwood Contains 15,000,000 BTUs
 1 Square foot of Sunshine in space contains 428 BTU/Hr or 127 Watts
 1 Square foot of Sunshine on earth (US average) contains 298 BTU/Hr or 87 watts
1 standard cord of wood= 8 feet x 4 feet x 4 feet = 128 cu feet = approx 4,000 pounds
1 face cord of wood= 8 feet x 4 feet x 16 inches = 42.7 cu feet = approx 1,333 pounds
1 cord of wood contains the same energy as 192 Kilograms of hydrogen in 1/600th the space
Some more energy related measurements
 1 barrel (bbl) = 42 gallons = 5.615 cubic feet = 159.0 liters
 1 barrel (oil) = 6,000,000 BTUs
 1 short ton (ton) = 2,000 pounds = 6.65 barrels (crude oil)
 1 metric ton (tonn) = 2,200 pounds
 1 therm = 100,000 Btu
 1 ton of TNT equivalent is equal to 4,186 megajoules or 3,967,772 BTUs
 1 quad = 1 quadrillion Btu = 10^{15} Btu or 293,071 Gigawatts
 1 kilowatthour (kWh) = 1,000 watthours
 1 megawatthour (MWh) = 1,000 kWh or 1,000,000 watthours
 1 gigawatthour (GWh) = 1,000 MWh or 1,000,000,000 watthours
 1 terawatthour (TWh) = 1,000 GWh or 1,000,000,000,000 watthours
A quadrillion is 1,000,000,000,000,000 (one thousand million million; 10^{15}; SI prefix is peta)
One Quad is:
 8,007,000,000 Gallons (US) of gasoline
 293,071,000,000 Kilowatthours (kWh)
 36,000,000 Tons of coal
 970,434,000,000 Cubic feet of natural gas
The US uses 5.05 quads of energy a month or 60.6 quads per year.
Some interesting Energy Factoids
 A Boeing 747400 burns aproximately 5 Gal of fuel per mile
 A Class 1 freight train uses 341 BTU's to move 1 ton one mile. (USDOT)
 A Typical Semi Truck uses 3,357 BTU's to move 1 ton one mile. (USDOT)
 A Boeing 747 Freighter uses 9,600 BTU's to move 1 ton one mile. (USDOT)
 An F14 Tomcat at full throttle burns 80 Gal of fuel per Minute
 A top Fuel Dragster gets the equivalent of 1/18 MPG (18Gal/Mile)
 The fuel pump on that same Top Fuel car pumps 65 GPM
 The average US household uses 92 Million BTUS of Energy per Year (2001)
 48% of this countrys electricity is produced by coal. 20% is Nuclear
 18% of electric production is from natural gas, and 11% is Hydroelectric
 7% of our Total energy comes from renewable resources 
 40% of ALL the energy we use comes from petroleum
 78% of the oil we use is used for transportation.
 Energy required for 1 Galaxy Class Warp drive: 4,857 Quadrillion BTUs/Minute
Gasoline Gallon Equivalents 
Fuel Type  Unit of Measure  BTUs/Unit  Gallon Equivalent 
Gasoline (regular)  gallon  114,100  1.00 gallon 
Diesel #2  gallon  129,500  0.88 gallons 
Biodiesel (B100)  gallon  118,300  0.96 gallons 
Biodiesel (B20)  gallon  127,250  0.90 gallons 
Compressed Natural Gas (CNG)  cubic foot  900  126.67 cu. ft. 
Liquid Natural Gas (LNG)  gallon  75,000  1.52 gallons 
Propane (LPG)  gallon  84,300  1.35 gallons 
Ethanol (E100)  gallon  76,100  1.50 gallons 
Ethanol (E85)  gallon  81,800  1.39 gallons 
Methanol (M100)  gallon  56,800  2.01 gallons 
Methanol (M85)  gallon  65,400  1.74 gallons 
Electricity  kilowatt hour(kWh)  3,414  33.56 kWhs 
U.S. Energy use for the month of October 2009 
Type of energy  Trillions of BTU's  Millions of Megawatt Hours  Amount 
Electricity  1,200  351  Not Applicable 
Natural Gas  1,800  527  1.8 Trillion Cubic Ft 
Gasoline  1,364  399  11 Billion Gallons 
Diesel Fuel  700  205  6.2 Billion Gallons 

Totals  5,064  1,482  A bunch!! 
Some useful and fun external links

