California is about 19 times smaller than Australia.

Australia is approximately 7,741,220 sq km, while California is approximately 403,882 sq km, making California 5.22% the size of Australia. Meanwhile, the population of Australia is ~26.1 million people (11.1 million more people live in California).
This to-scale comparison of Australia vs. California uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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