Asteroid impacts are among the most consequential events in planetary evolution, influencing habitability trajectories over geological timescales. While large impacts can devastate ecosystems and delay the emergence of complex life, smaller events may enrich environments with nutrients, deliver volatiles, and stimulate adaptive radiation. We propose the Energy-Based Habitability Impact Ranking (EHAR) system, a framework that classifies asteroid impacts according to their potential to advance or delay planetary habitability based on kinetic impact energy. By integrating Biodiversity and Ecosystem Stability theory, EHAR captures how biospheres respond to disturbances of varying magnitudes and at different evolutionary stages. Using scaling laws and crater data, we apply EHAR to well-studied impact structures on Earth, including Chicxulub, Sudbury, and Vredefort. The results highlight how the same energy magnitude can have dramatically different biological consequences depending on biosphere complexity. We extend the discussion to exoplanetary systems, emphasizing how planetary system architecture influences impact regimes. EHAR provides a cross-disciplinary framework that links planetary impact physics with ecological resilience, offering a new tool for assessing habitability in the solar system and beyond.