Alberta is about 1.5 times smaller than South Australia.

South Australia is approximately 984,321 km² (380,048 sq mi), while Alberta is approximately 661,848 km² (255,541 sq mi), making Alberta 67.24% the size of South Australia.
Tip: This to-scale comparison of South Australia vs. Alberta uses the Mercator projection, which distorts the size of regions near the poles.
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