Chapel Hill is about 11 times smaller than Madrid.

Madrid is approximately 604 sq km, while Chapel Hill is approximately 56 sq km, making Chapel Hill 9.3% the size of Madrid.
Tip: This to-scale comparison of Madrid vs. Chapel Hill 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.