This paper presents a novel concept entitled as Absolute Energy, which defines energy as a quantified value of a system independent from the observer. Absolute Energy is defined as the total kinetic energy of all bodies within a system which would be required to bring the system to rest at a specific reference point and time, without transformation of kinetic energy into other forms or other forms into kinetic energy. This work extends the concepts of centrial motion and angular motion to present a unified understanding and quantification of energy in systems. This approach intends to resolve the concepts in classical and contemporary mechanics, addressing their shortcomings and limitations. Classical and contemporary physics often define energy relative to an observer's frame of reference when analyzing isolated or multi-body systems, resulting in inconsistencies and ambiguities in establishing energy quantification. Absolute Energy is linked to the relative motions and momentums of the system’s components. In this paper, analysis of various scenarios, including two-body and multi-body systems using this new framework yields derivations for total energy quantifications. This, then, illustrates the credibility and robustness of the concept by detailing the interplay of linear and angular motions.These findings demonstrate that Absolute Energy solves for derivations that are not often provided for in traditional classical definitions. Such findings can be seen to have new application to astrophysics, thermodynamics and classical mechanics, and are therefore challenging the foundations of classical and contemporary mechanics. As a result, this work is a beginning toward further research into energy properties of isolates systems and the universe as a whole.