Indiana is about 83 times smaller than Australia.

Australia is approximately 7,741,220 sq km, while Indiana is approximately 92,895 sq km, making Indiana 1.2% the size of Australia. Meanwhile, the population of Australia is ~27.6 million people (20.6 million fewer people live in Indiana).
Tip: This to-scale comparison of Australia vs. Indiana 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.