~= 8462350804 GeV 249 MeV 444 keV 7 eV 7/8 eV
1 ft-lb = 8462350804.2494 GeV
1 GeV = 1.1817047332732E-10 ft-lb
https://www.unitjuggler.com/energy-convertir-ftlb-a-GeV.html