How long is the Great Wall of China, in miles?
Guess before you scroll — the answer is below
The answer
13,171 miles
Roughly 13.2K.
A 2012 government survey measured all branches and sections of the Great Wall at 13,171 miles — more than half the circumference of the Earth. It is not one continuous wall but a network built over two millennia. And no, it is not visible from space with the naked eye.
How to get close to this number
The comparison in the explanation is also the estimation tool: the total is a large fraction of the Earth's circumference. If you know roughly how far it is around the planet — and that is a number worth memorising, because it anchors dozens of other questions — then the wall is a recognisable slice of it rather than an abstract length.
Almost everyone guesses low, and the reason is the mental image of a single wall running along a ridge. As the explanation says, it is not one wall. It is a network of walls, trenches and natural barriers built by different dynasties over two thousand years, with parallel and overlapping lines, and the survey counted all of it. A question about a famous structure is very often a question about how its boundaries were drawn.
That is also why the figure changed dramatically when the 2012 survey was published: earlier numbers counted only the best-known Ming sections. And the claim in the last line of the explanation is worth repeating because it is the most persistent myth attached to any structure on Earth — the wall is long but narrow, and narrowness is what determines visibility from orbit, not length.
Where this number comes from
| Source | Chinese State Administration of Cultural Heritage survey |
|---|---|
| Figure refers to | 2012 |
| Last checked | |
| Unit | miles |
Numbers move. If this one has drifted from its source, let us know.
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