This textbook and exercise book on constructive lightweight design covers the calculation fundamentals in vehicle and mechanical engineering. Special emphasis has been placed on a practice-oriented presentation. It methodically introduces work techniques and constructive questions. The aim of the book is to highlight specific principles and analogies to provide the reader with suitable problem-solving approaches. Due to the numerous exercise examples, it is very well-suited for self-study. Many practical implementation tips also make it a reliable guide for engineers. For the 11th edition, several chapters have been revised; for example, the systematization of lightweight construction regarding strategies, methods, and principles has been expanded, and the design and calculation methods for composite materials have been supplemented, ensuring that the book continues to reflect the current state of technology.