quad

1

Convert between quads and other major units of energy.

In the United States, 10¹⁵ (1 quadrillion, American style) British thermal units, approximately 1.055 × 10¹⁸ joules. This unit is used for such purposes as reporting the total annual energy consumption in the American economy. One quad is roughly the amount of energy in:

44 million short tons of bituminous coal
172 million barrels of crude oil
980 billion standard cubic feet of dry natural gas
190 million barrels of motor gasoline
3.64 trillion standard cubic feet of hydrogen

2

“A proposed large unit of length = ten million metres, or approximately the length of an earth quadrant.”

Latimer Clark.
A Dictionary of Metric and Other Useful Measures.
London: E. & F. N. Spon, 1891.