City size comparison

compared to

Berlin is about 13 times bigger than Boulder.

Boulder is approximately 70 sq km, while Berlin is approximately 891 sq km, making Berlin 1,180% larger than Boulder.
Tip: This to-scale comparison of Boulder vs. Berlin uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Berlin vs. Boulder

Flip Comparison · See true size
See Berlin on top of Boulder
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Cost of Living Comparison · 7 categories - 2026 data
Boulder is 20.0% more expensive than Berlin
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