Sydney is about 3.1 times smaller than Springfield.

Springfield is approximately 83 sq km, while Sydney is approximately 27 sq km, making Sydney 32.35% the size of Springfield.
Tip: This to-scale comparison of Springfield vs. Sydney 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.