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A blue whale can weigh as much as 200 short tons (400,000 lbs). An adult blue whale can weigh up to around 180 metric tons (400,000lbs). A blue whale can weigh as much as 200 short tons (400,000 lbs).An adult blue whale can weigh up to around 180 metric tons (400,000lbs). A blue whale calve can weigh up to 2.7 metric tons (almost 6000lbs)
An adult male humpback whale generally reaches 45-50 feet (13-15 m) in length, and the slightly larger females are 52-56 feet (16-17 m) long. Adult humpback whales weigh between 25 and 40 tons. Calves are born only 13-15 feet (4-4.5 m) long, weighing up to 1 ton.