Atlanta is about 3.8 times bigger than Rochester.

Rochester is approximately 93 sq km, while Atlanta (map shows its 114 named neighbourhoods; the area covers the whole city) is approximately 350 sq km, making Atlanta 278% larger than Rochester.
Tip: This to-scale comparison of Rochester vs. Atlanta 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.