Blue whale size comparison
Blue whales grow up to about 33.5 m (110 ft) long, according to NOAA Fisheries. Here is one drawn to scale next to a person, other whales, a shark, an elephant and a car.
Blue whale size comparison: the tool
How big is a blue whale?
Maximum length. Antarctic blue whales reach about 110 ft; in the North Atlantic and North Pacific about 90 ft.
| What | Size | Source |
|---|---|---|
| Blue whale Maximum length. Antarctic blue whales reach about 110 ft; in the North Atlantic and North Pacific about 90 ft. | 33.5 m (110 ft) long range 27.4 m (90 ft) to 33.5 m (110 ft) | NOAA Fisheries |
Use the board above to put the whale next to anything else in the library, or add yourself to see how a person compares.
Questions
How long is a blue whale?
Up to about 33.5 m (110 ft) long on the NOAA Fisheries figures used here; sources give 27.4 m (90 ft) to 33.5 m (110 ft).
How many people would fit along a blue whale?
About 19 average US men (175.3 cm, CDC NHANES 2015 to 2018) lying head to toe.
Was any dinosaur longer than a blue whale?
By length, possibly: Argentinosaurus is estimated at about 35 m from partial fossils (Natural History Museum), a little longer than the 33.5 m used here for the blue whale. See the dinosaur size comparison.
Sources
- NOAA Fisheries: Blue Whale (checked 2026-10-02)
Last checked: 5 October 2026