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Unit converter and glossary

For common energy units

In this report

Use the IEA unit converter tool below to convert between units of energy, mass and volume commonly used in the energy sector.
Unit converter
Energy units

British Thermal Unit

calorie

joule

tonne of coal equivalent

tonne of oil equivalent

watt hour

Mass units

gramme

pound

long ton

tonne

short ton

Volume units

barrel

cubic foot

US gallon

UK gallon


litre

cubic meter