World Energy Outlook 2006

Annex C – Abbreviations and Definitions
ANNEX C
ABBREVIATIONS AND DEFINITIONS
This annex provides general information on abbreviations, fuel, process and
regional definitions, and country groupings used throughout WEO-2006.
Conversion factors for oil, gas and coal have also been included. Readers
interested in obtaining more detailed information should consult the annual
IEA publications Energy Balances of OECD Countries; Energy Balances of
Non-OECD Countries; Energy Statistics of OECD Countries; Energy Statistics of
Non-OECD Countries; Coal Information; Oil Information; Gas Information; and
Renewables Information.
Abbreviations
Oil b/d barrels per day
kb/d thousand barrels per day
mb/d million barrels per day
mpg miles per gallon
Gas tcf thousand cubic feet
mcm million cubic metres
bcm billion cubic metres
tcm trillion cubic metres
Oil and Gas boe barrels of oil equivalent
Energy toe tonne of oil equivalent
Mtoe million tonnes of oil equivalent
MBtu million British thermal units
GJ gigajoule (1 joule x 10 9 )
EJ exajoule (1 joule x 10 18 )
kWh kilowatt-hour
MWh megawatt-hour
GWh gigawatt-hour
TWh terawatt-hour
Power W Watt (1 joule per second)
kW kilowatt (1 Watt x 10 3 )
MW megawatt (1 Watt x 10 6 )
GW gigawatt (1 Watt x 10 9 )
TW terawatt (1 Watt x 10 12 )
Mass kt kilotonnes (1 tonne x 10 3 )
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© OECD/IEA, 2007