A blue whale’s heart weighs about 400 pounds, which is roughly 180 kilograms, in typical documented specimens.

Quick Scoop: Blue Whale Heart

  • Most commonly cited weight: about 400 pounds (around 180–200 kg).
  • Some reports suggest exceptionally large hearts may be heavier, but 400 pounds is the standard scientific figure.
  • That makes it the largest heart of any animal on Earth.

So if you’re wondering how much does a blue whale’s heart weigh , the best- supported answer is: about 400 pounds (≈180 kg).

Information gathered from public forums or data available on the internet and portrayed here.