Atlanta is about 1.2 times bigger than Fort Wayne.

Fort Wayne (map shows its 315 named neighbourhoods; the area covers the whole city) is approximately 289 sq km, while Atlanta (map shows its 114 named neighbourhoods; the area covers the whole city) is approximately 350 sq km, making Atlanta 21% larger than Fort Wayne.
Tip: This to-scale comparison of Fort Wayne 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.