City size comparison

compared to

Boulder is about 48 times smaller than Hanoi.

Hanoi is approximately 3,360 sq km, while Boulder is approximately 70 sq km, making Boulder 2.07% the size of Hanoi.
Tip: This to-scale comparison of Hanoi vs. Boulder uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Boulder vs. Hanoi

Flip Comparison · See true size
See Boulder on top of Hanoi
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Cost of Living Comparison · 7 categories - 2026 data
Hanoi is 70.0% cheaper than Boulder
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