A diverse range of materials like fuels, fertilizers, processed foods, life-saving pharmaceuticals and filtered clean water are being produced today. Several stages and processes are gone through during their production. Different materials or chemicals are added or removed in each step, and energy in the form of heat is also gained or lost. A chemical engineer needs to have a thorough understanding of how much of different materials are needed for the required output, as well as the energy balance of the processes involved. Taking a course in chemical process calculations will help an engineer to gain such an understanding. The book provides a simple treatment of the subject matter. The fundamental principles are explained through 173 worked examples. 154 exercise problems with answers are also given for practice.