Ejemplo:
15 keV = 2.279381e-18 Btu (th)
1 keV = 1.519587e-19 Btu (th) | 1 Btu (th) = 6.580735e+18 keV
Pasos de conversión:
15 × (1.602177e-16 / 1054.349999974) = 2.279381e-18