It depends on species. A blue whale (Balaenoptera musculus) calf can weigh 6,000-8,000 lbs (2,700-3600 kg), while a minke whale (Balaenoptera acutorostrata) calf may only weigh 700 lbs (320 kg).
No animals are born adult, so the question makes no sense.
baby whales weigh 690-1100
The largest whales (blue whales) weigh 100 to 150 tons.
It weigh 50 pd
1.5 tons
about 7,000 pounds
a sperm whales head ways about 5 tons (tonnes)
it weighes about 5 tons!
3 tons or 6000 lbs
About 15 to 35 lbs
Blue whales don't have a specific average weight. They do have a range which is round 100-120 tons. However, Blue whales can weigh as much as just over 200 tons.
About 10 tonnes or under depending how big it is
3 tons or 6000 lbs
That would depend on the species of what, its sex and how old it was.