Indianapolis is about 2.1 times bigger than Wellington.

Wellington (map shows its 57 named neighbourhoods; the area covers the whole city) is approximately 444 sq km, while Indianapolis is approximately 935 sq km, making Indianapolis 111% larger than Wellington.
Tip: This to-scale comparison of Wellington 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.