One quad (meaning one quadrillion) is equivalent to:

• 1 X 10¹⁵ BTU
• 252 X 10¹⁵ calories or 252 X 10¹² K calories

In fossil fuels, one quad is equivalent to:

• 180 million gallons (681 million liters) of crude oil
• 0.98 trillion cubic feet (0.028 trillion cubic meters) of natural gas
• 37.88 million tons of anthracite coal
• 38.46 million tons of bituminous coal

In nuclear fuels, one quad is equivalent to 2,500 tons of triuranium octaoxide (U₃O₈) if only uranium–235 (U₂₃₅) is used.

In electrical output, one quad is equivalent to 2.93 X 10¹¹ kilowatt-hours electric.