**Physics Calculator** is a lightweight, zero-dependency computational utility engineered in pure ANSI C for students, educators, and physics enthusiasts. Designed for cross-platform use on Windows, Linux, and macOS, it delivers essential physics calculations through an intuitive, menu-driven terminal interface requiring only the standard C library and `libm`. Core capabilities span classical mechanics (kinematics, Newton's laws, work-energy), thermodynamics (ideal gas law, heat transfer), electromagnetism (Coulomb's law, Ohm's law, capacitance), optics (lens equations, Snell's law), and modern physics (photoelectric effect, relativistic energy). Built with strict input validation, buffer-safe string handling, and explicit memory management, the tool ensures robustness without external packages—compiling to a compact ~35 KB binary. Its modular architecture encapsulates each physics domain in dedicated functions, enabling easy extension while maintaining deterministic, reproducible results. Key features include unit-aware computations, scientific notation output (`%.4e`), and contextual prompts reducing calculation errors. Ideal for homework verification, lab preparations, or rapid reference, Physics Calculator transforms complex physical formalisms into accessible, offline-capable computations. With clear CLI navigation, formatted results, and MIT licensing, the project offers complete transparency for educational use, customization, or integration into larger scientific workflows. Whether solving projectile motion, verifying circuit parameters, or exploring relativistic effects, users benefit from reliable, keyboard-driven computational power—making it a versatile companion for academic study, teaching demonstrations, or scriptable automation pipelines. 🔬🧮💻

Physics-Calculator

a lightweight, zero-dependency computational utility engineR

a lightweight, zero-dependency computational utility engineR