World marketed energy consumption was about 524 quadrillion British thermal units (Btu) in 2011.¹ The commercial sector, industrial sector, residential sector, and transportation sector are the four major energy end-use sectors. The electric power sector also consumes energy. The electricity produced by the electric power sector is consumed by the other end-use sectors. There are also losses in electricity generation, transmission, and distribution. The electricity consumed by the four major energy end-use sectors and electricity losses can be apportioned to these respective end-use sectors to calculate their total energy use. Losses are the difference between the amount of energy used to generate electricity and the energy content of the electricity consumed at the point of end use.

World energy consumption by end-use sector (quadrillion Btu) and shares of total energy use, 2011 (includes losses in electricity generation, transmission, and distribution)

¹ This is the most recent year for which data are available at the time of update.
² Energy end use includes end use of electricity but excludes losses.
³ Electricity losses includes losses in generation, transmission, and distribution.
⁴ Total energy use includes electricity losses.