quad

quad

Energyexact by definition

The quad is one quadrillion BTU, 10¹⁵ BTU_IT, exactly 1.05505585262 × 10¹⁸ joules, or 1.055 exajoules. It exists for one purpose: stating national energy consumption in a single-digit number. The United States uses roughly 94 quads a year and the world about 600.

1 quad 1.0550559e+18 J