Bucharest is about 3 times smaller than Tehran.

Tehran is approximately 686 sq km, while Bucharest is approximately 226 sq km, making Bucharest 32.94% the size of Tehran.
Tip: This to-scale comparison of Tehran vs. Bucharest 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.