How big is a sperm whale?
A sperm whale is about 40 to 52 ft12 to 16 m1 long, females to males. The biggest toothed whale, and one of the deepest divers of all.
A sperm whale next to you
Next to a child about four feet tall: the sperm whale is about 12 of you long, lying head to toe.
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Where the numbers come from
- NOAA Fisheries, checked 30 October 2026.