Bangkok is about 3.8 times bigger than Venice.

Venice is approximately 415 sq km, while Bangkok is approximately 1,569 sq km, making Bangkok 278% larger than Venice.
Tip: This to-scale comparison of Venice 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.