quad | |
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A Sankey diagram using quads. | |
General information | |
Unit of | energy |
Symbol | quad |
Conversions | |
1 quad in ... | ... is equal to ... |
US customary units | 1015 BTU |
SI | 1.055×1018 joule |
A quad is a unit of energy equal to 1015 (a short-scale quadrillion) BTU, or 1.055×1018 joule (1.055 exajoules or EJ) in SI units.
The unit is used by the U.S. Department of Energy in discussing world and national energy budgets. The global primary energy production in 2022 was 637.8 quad, i.e., 672.9 EJ.
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Some common types of an energy carrier approximately equal to 1 quad are:
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