Fort Wayne is about 1.8 times smaller than Warsaw.

Warsaw is approximately 517 sq km, while Fort Wayne (map shows its 315 named neighbourhoods; the area covers the whole city) is approximately 289 sq km, making Fort Wayne 55.97% the size of Warsaw.
Tip: This to-scale comparison of Warsaw vs. Fort Wayne 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.