The mass of cremated remains following cremation is significantly less than the original body weight. Several factors influence the final weight, but a general estimate can be provided. The process reduces organic matter to its basic elements, primarily bone fragments and inorganic ash.
The reduction in mass is primarily due to the combustion of water, soft tissues, and organic compounds. Bone density, age, and sex contribute to the variance in the amount of remains. The equipment and the cremation process also play a role in the outcome.