Ejemplo:
15 nJ = 1.422677e-11 Btu (th)
1 nJ = 9.484517e-13 Btu (th) | 1 Btu (th) = 1.05435e+12 nJ
Pasos de conversión:
15 × (1e-9 / 1054.349999974) = 1.422677e-11