The Planck mass is a fundamental unit of mass in the realm of theoretical physics, defined as approximately 2.18 \times 10^-8 kilograms. It is derived from three fundamental constants: the Planck constant, the gravitational constant, and the speed of light. This mass scale is significant in quantum gravity theories, where it represents the mass at which quantum effects of gravity become significant. In the context of particle physics, the Planck mass is much larger than typical elementary particles, such as electrons or protons. It serves as a bridge between quantum mechanics and general relativity, suggesting that at this mass scale, the effects of gravity cannot be ignored, leading to potential insights into the nature of black holes and the early universe.