Zoom out from an average adult to the Colosseum
The Colosseum 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 → Colosseum
The Colosseum is about 2–3.2 times as tall as a megalodon is long.
Step 2: Megalodon and Colosseum at the same scale.
Dimensions
| Measurement | Metric | Imperial | Notes | Source |
|---|---|---|---|---|
| Height | ≈ 48 m | ≈ 160 ft | Height of the building as given by Rome's official tourism site, which words it as 'over 48 meters high'. Approximate | [1] |
| Length (long axis) | 189 m | 620 ft | Overall length along the long axis of the oval (Britannica gives 620 ft) | [1] [2] |
| Width (short axis) | 156 m | 512 ft | Overall width along the short axis of the oval (Britannica gives 513 ft) | [1] [2] |
| Footprint | ≈ 24,000 m² | ≈ 260,000 sq ft | Ground area covered by the building. Approximate | [1] |
| Arena floor length | 76 m | 249 ft | The arena floor was 76 m long and 46 m wide | [1] |
About the Colosseum
The Colosseum is the oval amphitheatre just east of the Palatine Hill in Rome, begun under the emperor Vespasian around 70-72 CE on the site of the drained lake of Nero's Golden House. Titus dedicated it in 80 CE with 100 days of games, and Domitian finished the top storey in 82 CE. Built of travertine, tufa and concrete, it measures about 189 by 156 m, stands about 48 m high and held around 50,000 spectators.
- It is the largest amphitheatre in the world. [3]
- Unlike earlier amphitheatres, which were mostly dug into hillsides, it is freestanding, held up by barrel and groin vaults. [2]
- Its outer arcades are framed by Doric, Ionic and Corinthian half-columns, and a huge awning called the velarium, worked by sailors, shaded the crowd. [2]
- The arena floor was a large wooden platform covered with sand. [1]
How many fit?
- ≈ 29 × Human · height lined up end to end match the Colosseum · height
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
- 29× The Colosseum is about 29 times as tall as an average adult. See side by side
- 1/1.9 The Statue of Liberty is about 1.9 times as tall as the Colosseum. See side by side
- 1/2.6 SpaceX's Starship is about 2.6 times as tall as the Colosseum. See side by side
- 1/4 The Gateway Arch is about 4 times as tall as the Colosseum. See side by side
- 1/5.6 The Titanic is about 5.6 times as long as the Colosseum is tall. See side by side
- 1/7.6 A giant cruise ship is about 7.6 times as long as the Colosseum is tall. See side by side
Factors compare the height of the Colosseum 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 Parco archeologico del Colosseo site did not respond, and its archived page gives no dimensions, so the height and footprint come from Rome's official tourism site and the plan dimensions from both it and Britannica.
- Turismo Roma words the height as 'over 48 meters high', so it is stored as approximate.
- No mass or volume from a primary source was found.
Sources
- Turismo Roma (Roma Capitale), The Flavian Amphitheatre (The Colosseum). Accessed 25 September 2026.
- Encyclopaedia Britannica, Colosseum. Accessed 25 September 2026.
- Parco archeologico del Colosseo (archived by the Internet Archive), The Colosseum. Accessed 25 September 2026.