California is about 24 times smaller than United States.

United States is approximately 9,833,517 sq km, while California is approximately 403,882 sq km, making California 4.11% the size of United States. Meanwhile, the population of United States is ~337.3 million people (300.1 million fewer people live in California).
This to-scale comparison of United States vs. California uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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