City size comparison

compared to

Boulder is about 18 times smaller than Rome.

Rome is approximately 1,287 sq km, while Boulder is approximately 70 sq km, making Boulder 5.41% the size of Rome.
Tip: This to-scale comparison of Rome vs. Boulder uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Boulder vs. Rome

Flip Comparison · See true size
See Boulder on top of Rome
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Cost of Living Comparison · 7 categories - 2026 data
Rome is 29.6% cheaper than Boulder
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