In this category of the formulary, the most important formulas of the quantum mechanics are listed. The theory of quantum mechanic was developed in the first half of the twentyth century in order to describe the physical phenomena on atomic lengthscales. In contrast to the macroscopic physics, the quantum mechnics is not that intuitive since the fundamental processes of quantum mechanics are out of the human perception. Using the formulas of quantum mechanics, it is possible to calculate expectation values of the physical quantities based on wavefunctions. The fundamental physical equation of the quantum theory is the Schrödinger equation which describes the dynamics of an undistorted quantum system.