Specific energy
PHYSICAL QUANTITY REPRESENTING ENERGY CONTENT PER MASS
Orders of magnitude (specific energy); Massic energy; Energy to weight ratio; KWh/kg; Caloric density; Orders of magnitude (specific energy density); KW⋅h/kg; Gravimetric energy density
Specific energy or massic energy is energy per unit mass. It is also sometimes called gravimetric energy density, which is not to be confused with energy density, which is defined as energy per unit volume.