Sydney is about 1.7 times smaller than Hartford.

Hartford is approximately 45 sq km, while Sydney is approximately 27 sq km, making Sydney 59.32% the size of Hartford.
Tip: This to-scale comparison of Hartford 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.