Rechargeable calcium (Ca) metal batteries present an exciting opportunity for electrochemical systems offering high energy density at low costs. Although Ca possesses intrinsic advantages as a metal anode, the feasibility of fabricating thin Ca metal foils for use as practical electrodes remains unexplored. This represents a critical objective for the realization of Ca metal batteries, while it currently limits the research progress in this area. In this study, we introduce a straightforward and effective method for producing Ca foils with a thickness of approximately 100 µm from inexpensive Ca metal chunks. Additionally, we demonstrate that mechanical deformation of Ca can induce alterations in hardness, structural features, and electrochemical properties. The as-prepared Ca foils exhibit enhanced electrochemical performance underscoring that mechanical processing is a key parameter controlling the electrochemical reliability of Ca metal anodes and provides a scalable pathway toward more practical Ca metal battery architectures. This processing method could significantly contribute to the advancement of the research and development of Ca batteries.