Bangkok is about 11 times bigger than Dayton.

Dayton is approximately 145 sq km, while Bangkok is approximately 1,569 sq km, making Bangkok 985% larger than Dayton.
Tip: This to-scale comparison of Dayton vs. Bangkok 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.