City size comparison

compared to

Boulder is about 9 times smaller than Madrid.

Madrid is approximately 604 sq km, while Boulder is approximately 70 sq km, making Boulder 11.52% the size of Madrid.
Tip: This to-scale comparison of Madrid vs. Boulder uses the Mercator projection, which distorts the size of regions near the poles.
Share

Compare further: Boulder vs. Madrid

Flip Comparison · See true size
See Boulder on top of Madrid
→
Cost of Living Comparison · 7 categories - 2026 data
Madrid is 13.8% cheaper than Boulder
→
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.
Download on the App Store GET IT ON Google Play