Zoom out from an average adult to the Space Needle
The Space Needle is too big to show next to an average adult in one picture, so here it is in 2 steps. Each step is drawn to its own scale and zooms out from the step before.
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Step 1 of 2 Human → Megalodon
A megalodon is about 8.6–15 times as long as an average adult is tall.
Step 1: Human and Megalodon at the same scale. -
Step 2 of 2 Megalodon → Space Needle
The Space Needle is about 7.6–12 times as tall as a megalodon is long.
Step 2: Megalodon and Space Needle at the same scale.
Dimensions
| Measurement | Metric | Imperial | Notes | Source |
|---|---|---|---|---|
| Height to the top of the beacon | 184 m | 605 ft | From the ground to the top of the red aircraft warning beacon | [1] [2] |
| Observation deck height | 158 m | 520 ft | Height of the observation deck in the top house | [3] [2] |
| Diameter of the halo | 42.1 m | 138 ft | Diameter of the halo ring around the top house (2016 fact sheet) | [3] |
| Foundation depth | 9.14 m | 30 ft | Depth of the concrete foundation below ground (it is 120 ft across) | [3] |
About the Space Needle
The Space Needle is an observation tower in Seattle built for the 1962 World's Fair, where it opened on 21 April 1962 after roughly 400 days of construction. Its slender legs carry a saucer-shaped top house with an observation deck at 520 ft, and the aircraft warning beacon on top reaches 605 ft above the ground. It stands on a 120 by 120 ft lot, anchored to a concrete foundation 30 ft deep.
- It took 467 cement trucks less than 12 hours to fill the foundation hole, at the time the largest continuous concrete pour attempted in the West. [3]
- The tower is fastened to its foundation with 72 bolts, each 30 ft long, and its centre of gravity is only 5 ft above the ground. [3]
- The two high-speed elevators travel at 10 mph (800 ft per minute) and reach the top house in 43 seconds. [3]
- Built in about 400 days, it was nicknamed the '400-day wonder'. [1]
How many fit?
- ≈ 110 × Human · height lined up end to end match the Space Needle · height to the top of the beacon
- ≈ 2 × Statue of Liberty · ground to tip of torch lined up end to end match the Space Needle · height to the top of the beacon
Counts divide one sourced figure by another. "End to end" uses each object's main measurement; weight and volume rows appear only when both figures are sourced.
How it compares
- 110× The Space Needle is about 110 times as tall as an average adult. See side by side
- 2× The Space Needle is about 2 times as tall as the Statue of Liberty. See side by side
- 1.5× The Space Needle is about 1.5 times as tall as SpaceX's Starship. See side by side
- 1/1 The Space Needle is about as tall as the Gateway Arch. See side by side
- 1/1.5 The Titanic is about 1.5 times as long as the Space Needle is tall. See side by side
- 1/2 A giant cruise ship is about 2 times as long as the Space Needle is tall. See side by side
Factors compare the height to the top of the beacon of the Space Needle with each object’s own main measurement (height for a human). Where a size varies, the factor is given as a range.
Notes on these figures
- The official fact sheets give weights in 'tons' without saying short or metric (the needle structure 3,700 tons and the foundation 5,850 tons), and the current fact page leaves the weight blank, so no mass is stored.
- The halo diameter, foundation and elevator figures come from a 2016 archived copy of the official fun-facts page, before the 2018 renovation; they may not reflect later changes.
Sources
- Space Needle, Space Needle Facts. Accessed 25 September 2026.
- Space Needle, About. Accessed 25 September 2026.
- Space Needle (archived by the Internet Archive, 2016), Fun Facts. Accessed 25 September 2026.