Chapel Hill is about 28 times smaller than Bangkok.

Bangkok is approximately 1,569 sq km, while Chapel Hill is approximately 56 sq km, making Chapel Hill 3.58% the size of Bangkok.
Tip: This to-scale comparison of Bangkok 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.