Boulder is about 2.6 times bigger than Charlottesville.

Charlottesville is approximately 27 sq km, while Boulder is approximately 70 sq km, making Boulder 162% larger than Charlottesville.
Tip: This to-scale comparison of Charlottesville vs. Boulder uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.