City size comparison

compared to

Hanoi is about 48 times bigger than Boulder.

Boulder is approximately 70 sq km, while Hanoi is approximately 3,360 sq km, making Hanoi 4,726% larger than Boulder.
Tip: This to-scale comparison of Boulder vs. Hanoi uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Hanoi vs. Boulder

Flip Comparison · See true size
See Hanoi on top of Boulder
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Cost of Living Comparison · 7 categories - 2026 data
Boulder is 3.3 times more expensive than Hanoi
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