The concept of the Ashta-Dikpala (Eight Directional Guardians) occupies a prominent position in ancient Indian cosmological, architectural, and spatial traditions. Classical Sanskrit literature, including the Vishnu Purana, Matsya Purana, and Agni Purana, describes a system of eight principal directions governed by corresponding Dikpalas, forming a complete directional framework for understanding and organizing space. This eight-direction model has been preserved across various traditions of Hindu cosmology, temple architecture, and Vastu literature. The present study examines the geometric implications of the Ashta-Dikpala framework and explores its numerical relationship with the modern circumference of the Earth. By representing the eight directions as equal divisions of a circle, the model naturally produces eight angular sectors of 45° each. Since a complete circle contains 360°, the eight-direction system generates a mathematically symmetrical structure that can be analyzed using modern geometric principles. Using the modern approximation of Earth's circumference (~40,000 km), one degree of arc corresponds to approximately 111.11 km. Accordingly, a 45° sector corresponds to approximately 5,000 km. When the eight directional sectors are considered collectively, the resulting value is approximately 40,000 km, which closely corresponds to the modern measured circumference of the Earth. This study proposes that the traditional Ashta-Dikpala framework may be interpreted as a geometric model whose numerical outcome exhibits a striking correspondence with Earth's circumference. The relationship emerges from combining the directional structure preserved in ancient Sanskrit sources with modern geometric analysis. While the directional system itself is explicitly described within the traditional literature, the circumference calculation presented in this paper represents a mathematical interpretation derived from that framework. The findings highlight an intriguing convergence between ancient directional cosmology and modern geometric measurement, suggesting that traditional Indian spatial concepts may contain deeper mathematical structures worthy of further investigation. The study encourages interdisciplinary research involving Sanskrit texts, Indian cosmology, the history of astronomy, and mathematical geography to better understand the scientific dimensions of ancient Indian knowledge systems.