A quad is a unit of energy equal to 1015 (a short-scale quadrillion) BTU,[1] or 1.055×1018 joule (1.055 exajoules or EJ) in SI units.
| quad | |
|---|---|
 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 |
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. [2]
Conversion
editSome common types of an energy carrier approximately equal to 1 quad are:
- 8,007,000,000 gallons (US) of gasoline
- 293,071,000,000 kWh
- 293.07 terawatt-hours (TWh)
- 33.434 gigawatt-years (GWy)
- 36,000,000 tonnes of coal
- 970,434,000,000 cubic feet of natural gas
- 5,996,000,000 UK gallons of diesel oil
- 25,200,000 tonnes of oil
- 252,000,000 tonnes of TNT or five times the energy of the Tsar Bomba nuclear test
- 12.69 tonnes of uranium-235 (with 83.14 TJ/kg)
- 6 seconds of sunlight reaching Earth
See also
editReferences
edit- ^ "Energy: Glossary". Department of Materials Science and Engineering, University of Illinois Urbana-Champaign.
- ^ Energy Information Administration (2023-10-31). "World total primary energy consumption by region, Reference case" (PDF). International Energy Outlook 2023.
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