City size comparison

compared to

Boulder is about 13 times smaller than Berlin.

Berlin is approximately 891 sq km, while Boulder is approximately 70 sq km, making Boulder 7.81% the size of Berlin.
Tip: This to-scale comparison of Berlin vs. Boulder uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Boulder vs. Berlin

Flip Comparison · See true size
See Boulder on top of Berlin
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Cost of Living Comparison · 7 categories - 2026 data
Berlin is 16.7% cheaper than Boulder
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