Animals
How long is a blue whale?
A blue whale is up to 33.5 m · 110 ft long.
Blue whale at true scale
- Blue whale up to 33.5 m · 110 ft
- Humpback whale up to 18.3 m · 60 ft
- Brachiosaurus 22 m · 72.2 ft
- Tennis court 23.8 m · 78 ft
Blue whale (blue) beside a humpback whale, a Brachiosaurus and a tennis court, all on one scale.
NOAA Fisheries says Antarctic blue whales can reach about 110 ft (33.5 m), while blue whales in the North Atlantic and North Pacific grow to about 90 ft. The game uses the Antarctic maximum, from the snout to the notch in the tail. A Boeing 737-800 is 39.5 m long — only a little longer than the biggest blue whales.
Compared with familiar things
- A blue whale is about 1.8× a humpback whale (up to 18.3 m · 60 ft).
- A blue whale is about 1.5× a Brachiosaurus (22 m · 72.2 ft).
- A blue whale is about 1.4× a tennis court (23.8 m · 78 ft).
- A blue whale is about 3.0× a New Routemaster bus (11.2 m · 36.9 ft).
Can you guess it by eye?
Play five comparisons featuring a blue whale: resize each object beside a fixed reference, then see how close you were. No sign-up needed.
Play five comparisonsWhat is measured
Maximum length, Antarctic blue whale: up to 33.5 m · 110 ft. NOAA: Antarctic blue whales reach up to about 110 feet; North Atlantic and North Pacific blue whales up to about 90 feet.
Source: NOAA Fisheries — Blue Whale. Checked 2026-09-28. The silhouette is scaled so this measurement is exact; its other proportions are illustrative.