Indianapolis is about 3.8 times bigger than Milwaukee.

Milwaukee is approximately 249 sq km, while Indianapolis is approximately 935 sq km, making Indianapolis 275% larger than Milwaukee.
Tip: This to-scale comparison of Milwaukee vs. Indianapolis 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.