Summary Table of Units of Energy Measurement
Published on 01.20.2015
High School
Physics  chemistry
10 min read
Below, a summary table of units of measurement used in the energy sector.
Name and abbreviation  Definition 

("bbl" or "b")  Unit of measurement for volume, specific to petroleum products. 1 barrel = 158.99 liters 
Barrel of oil equivalent ( )  1 barrel of oil equivalent corresponds to the energy produced when a barrel of oil is burned. 
British Thermal Unit (BTU)  Imperial unit of measurement for energy. 1 BTU ≈ 1055 joules (J) 
Calorie (cal), thermie (th)  Former unit of measurement for energy. 1 calorie = 4.184 joules (J) 1 thermie = 1 million calories 
Cubic foot (CF)  Imperial unit of measurement for volume. 1 cubic foot = 28.32 liters (l) 
Cubic meter (m^{3})  Unit of measurement for volume. 
Cubic meter per second (m^{3}/s)  Unit of measurement for flow. 
Degree Celsius (°C)  Unit of measurement for temperature, derived from the International System of Units. 
Gallon (gal)  Imperial unit of measurement for volume. 1 U.K. gal = 4.546 liters (l); 1 U.S. gallon = 3.785 liters (l) 
Horsepower (hp)  Unit of measurement for power 1 horsepower = 735.5 watts (W) 
Joule (J)  Official unit of measurement for energy. 
Kilowatthour (kWh)  Commonly used unit of measurement for energy kilowatthour = 3.6 × 10^{6} joules (J) 
Meter per second (m/s)  Unit of measurement for speed. 
Stere (st)  Unit of measurement for a volume of wood. 1 stere = 1 cubic meter of stacked logs, including the empty spaces between them 
Ton (t)  Unit of measurement for weight. 
1 ton of
equivalent equals the energy produced when a ton of coal is burned. 1 ton of coal equivalent = 0.66 (toe), on average 

Ton of oil equivalent (toe)  1 ton of oil equivalent equals the energy produced when a ton of oil is burned. 
Watt (W)  Official unit of measurement for power. 