Copenhagen is about 2.5 times smaller than Bucharest.

Bucharest is approximately 226 sq km, while Copenhagen is approximately 90 sq km, making Copenhagen 39.83% the size of Bucharest.
Tip: This to-scale comparison of Bucharest vs. Copenhagen 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.