Milan is about 2.9 times smaller than Budapest.

Budapest is approximately 525 sq km, while Milan is approximately 182 sq km, making Milan 34.61% the size of Budapest.
Tip: This to-scale comparison of Budapest vs. Milan 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.