Pie libra

\[\begin{aligned} y[Joule] &= 1.35582x[foot\ pound] \\ y[Kilojoule] &= 0.00135582x \\ y[gram\text{-}calorie] &= 0.324048x \\ y[Kilocalorie] &= 0.000324048x \\ y[Watt\ hour] &= 0.000376616x \\ y[Kilowatt\ hour] &= 3.7662 \times 10^{-7}x \\ y[Electronvolt] &= 8.462 \times 10^{18}x \\ y[British\ thermal\ unit] &= 0.00128507x \\ y[US\ therm] &= 1.2854 \times 10^{-8}x \end{aligned}\]