More than 150,000 quake victims have been buried by the Haitian government, a minister said.
The truckers filling Haiti's mass graves with bodies have reported ever higher numbers.
That total does not include those still under the debris in the capital Port-au-Prince, carried off by relatives or killed in the outlying quake zone.
"Nobody knows how many bodies are buried in the rubble - 200,000? 300,000? Who knows the overall death toll?" said Communications Minister Marie-Laurence Jocelyn Lassegue.
Meanwhile, a global army of aid workers was getting more food into people's hands, but acknowledged falling short.
"We wish we could do more, quicker," said UN World Food Programme chief Josette Sheeran, visiting Port-au-Prince.
The Haitian government was urging many of the estimated 600,000 homeless huddled in open areas of Port-au-Prince, a city of two million, to look for better shelter with relatives or others in the countryside.
Some 200,000 were believed already to have done so, most taking advantage of free government transportation, and others formed a steady stream out of the city on Sunday.
International experts searched for sites to erect tent cities for quake refugees on the capital's outskirts, but such short-term solutions were still weeks away, said the International Organisation for Migration, an intergovernmental agency.
The final casualty estimates, which the European Commission said include 200,000 dead and some 250,000 injured, will clearly place the January 12 earthquake among the deadliest natural catastrophes of recent times. That list includes the 1970 Bangladesh cyclone, believed to have killed 300,000 people; the 1974 northeast China earthquake, which killed at least 242,000 people; and the 2004 Indian Ocean tsunami, with 226,000 dead.