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A blue whale calf is about 7 m (23') long at birth, and they weigh up to 2,700 kilograms (6,000 lb) as a newborn, gaining approx 90 kilograms (200 lb) every 24 hours.

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13y ago
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9y ago

The length is at 19.5ft. The weight is around 2.5-4 tons. This can vary but this is the average length and weight.

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12y ago

7 m long and weighs about 2,700 kg

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Q: How big is a newborn blue whale baby?
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