Standards Australia is expected to recommend "an increase in the strength of toilet seats to accommodate the increasing size of humans".
The percentage of Australians who are overweight or obese has jumped from 10 percent in the past decade to 62 percent of men and 45 percent of women.
Toilet seats are currently required to meet a rigidity test of 45 kilograms or 99 pounds, which supports most people's weight in a seated position.
A heavyweight committee, including manufacturers and consumers, will assess whether that standard was still adequate.