Tonnes of Oil Equivalent (toe)

Nothing to do with feet, “toe” in energy is the unit “tonnes of oil equivalent”. Like boe (barrels of oil equivalent) it’s a measure most often seen in datasets and charts looking at country-scale energy mixes where different energy sources and types are converted to a single common unit. It represents the amount of energy you’d get out of burning a tonne of crude oil. As with boe, it is defined by convention, since different grades of oil can¬†contain different amounts of energy in the same weight or volume. The IEA define 1 toe as 11.63 MWh.