Abstract: Apparatus and associated methods relate to a multi-purpose functional ruck weight (FRW). The FRW includes a packing mode, a two-handed swinging mode, and a dumbbell mode. The FRW is a weight reflectively mirrored about a bisecting longitudinal axis. The weight includes a top and a bottom surface. The FRW includes a swing handle defined by a first aperture extending through the top and bottom surfaces. The weight may be carried in a rucksack against the user's body in a packing mode. The first aperture may be configured such that the first and second hand of the user, in a two-handed swinging mode, are spatially distributed and oriented along intersecting axes. The grip handle may be configured, in a dumbbell mode, such that the user's first hand is inserted through the second and third aperture to grip the grip handle at the center of the FRW.