Don't know. But I'll find out
[edit]Ash weight and composition
Cremated remains being scattered at sea
Cremated remains are mostly dry calcium phosphates with some minor minerals, such as salts of sodium and potassium. Sulfur and most carbon are driven off as oxidized gases during the process, although a relatively small amount of carbon may remain as carbonate.
The ash remaining represents very roughly 3.5% of the body's original mass (2.5% in children). Because the weight of dry bone fragments is so closely connected to skeletal mass, their weight varies greatly from person to person. Because many changes in body composition (such as fat and muscle loss or gain) do not affect the weight of cremated remains, their weight can be more closely predicted from the person's height and sex than from their simple weight.
Ashes of adults can be said to weigh from 4 pounds (1.8*kg) to 6 pounds (2.7*kg), but the first figure is roughly the figure for women and the second for men. The mean weight of adult cremated remains in a Florida, U.S. sample was 5.3*lb (approx. 2.4*kg) for adults (range 2 to 8 lb*or 0.91 to 3.6 kg). This was found to be distributed bimodally according to sex, with the mean being 6 pounds (2.7*kg) for men (range 4 to 8 lb*or 1.8 to 3.6 kg) and 4 pounds (1.8*kg) for women (range 2 to 6 lb*or 0.91 to 2.7 kg). In this sample, generally all adult cremated remains over 6 pounds (2.7*kg) were from males, and those under 4 pounds (1.8*kg) were from females.[16]