What are the limits of human memory capacity?

Short Answer

Working memory is limited, and long-term memory is large but constrained by attention, consolidation, and retrieval. Forgetting often comes from weak cues and interference—not “running out of space.”

Why This Matters

Because limits are mostly about access, better strategies focus on encoding and cue design rather than brute repetition. Understanding interference leads to smarter organization, which results in more reliable recall and less frustration.

Where This Changes

Exceptional “memory feats” typically rely on techniques and training, not photographic storage. Stress, sleep loss, and illness can sharply reduce performance even when your underlying knowledge hasn’t changed.