Different Energy Sources - Energy Units and Conversions

Different Energy Sources

This diagram will show you the different types Energy Sources -  

Energy Units and Conversions

• In SI method the unit of energy is Joule (J). 
• In CGS unit dyne-cm (equals to 10^-7) 
• In British Unit - foot pound force  (ft-lbf) 

Other units are
British Thermal Unit (BTU)  1 BTU - 1055 Joule .
Kilowatt hour (kWh) 1 kWh = 3.6 x 10⁶  J = 3.6 MJ. 
Calorie . 1 Calorie - 4.186 Joules.
Therm . 1 Therm = 100,000 BTU 
Million Tons of Oil Equivalent (Mtoe) - equals to 4.186 x 10⁴ TJ 
Quadrillion Btu or 10¹⁵ Btu. Also known as Quad.