Sperm whales are thought to dive regularly to around 1,000 meters (about 3,300 feet) and can reach at least about 2,000–2,250 meters (6,600–7,400 feet) in especially deep dives.

Quick Scoop

  • Typical dive depth: around 600–1,000 meters where they hunt deep‑sea squid.
  • Deep “recorded” dives: about 2,000–2,250 meters (roughly 2 km below the surface).
  • Dive duration: often 45–60 minutes; some measured dives last over 1 hour.
  • Why they go so deep: to reach dense layers of squid and other deep‑sea prey that stay in near‑darkness.

How this compares to other deep divers

  • Sperm whales are among the deepest‑diving mammals, but a few beaked whales have recorded even longer and deeper dives.
  • Still, for a 15–20 meter animal with the largest brain on Earth, their ability to routinely work at 1 km depth is extraordinary.

In simple terms, when you ask “how deep can sperm whales dive,” the best current evidence points to routine dives near 1 km and exceptional dives a bit beyond 2 km down.

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