Accurate estimation of tree biomass and volume is crucial for forest management, carbon sequestration studies, and ecological research. Traditional methods, such as harvesting and weighing trees, are destructive and impractical for large-scale assessments. Non-destructive methods provide an alternative approach by utilizing allometric equations, remote sensing technologies, and ground-based measurements. Techniques such as laser scanning (LiDAR), photogrammetry, and ground-based dendrometric measurements (e.g., tree height, diameter at breast height, and wood density) enable precise biomass and volume estimation without damaging the tree. This paper reviews various non-destructive methods, highlighting their advantages, limitations, and applications in forestry and environmental monitoring.