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Blue Whale vs Megalodon Size Comparison

A blue whale is about 1.6 times longer than a megalodon: 82 ft (25 m) against 52 ft (16 m). By volume, about 2 megalodons would fit inside a blue whale.

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Which is bigger, a blue whale or a megalodon?

A blue whale is bigger. A blue whale is 30 ft (9 m) longer than a megalodon. That makes a blue whale 1.6× the size of a megalodon.

Measure	Blue whale	Megalodon
Size	82 ft (25 m) long	52 ft (16 m) long
Record size	—	—
Weight	≈ 120,000 kg	≈ 61,500 kg
Volume	≈ 120 m³	≈ 61.5 m³

How many megalodons fit in a blue whale?

By volume, about 2 megalodon would fit inside a blue whale. That makes a blue whale 1.6× the size of a megalodon. Volume grows with the cube of length, which is why the volume number is so much bigger.

Where do these numbers come from?

Sizes are typical adult or reported values, rounded for readability. Read how we measure and compare sizes.

Silhouettes from PhyloPic: Blue whale by Scott Hartman; Megalodon by Russell Engelman. See credits.