Engineering calculations refer to mathematical procedures and techniques used by engineers to design, analyze, and optimize systems or components. These calculations are essential in solving complex problems that involve various engineering disciplines such as mechanics, thermodynamics, electromagnetism, and fluid dynamics. They help engineers make accurate predictions about the behavior of a system under certain conditions, ensuring its safety, efficiency, and reliability. Engineering calculations can be performed using mathematical formulas, numerical methods or computer simulations, depending on the complexity of the problem at hand.