Ejemplo:
15 eV = 2.279381e-21 Btu (th)
1 eV = 1.519587e-22 Btu (th) | 1 Btu (th) = 6.580735e+21 eV
Pasos de conversión:
15 × (1.602177e-19 / 1054.349999974) = 2.279381e-21