California is about 1.7 times bigger than United Kingdom.

United Kingdom is approximately 243,610 sq km, while California is approximately 403,882 sq km, making California 66% larger than United Kingdom. Meanwhile, the population of United Kingdom is ~67.8 million people (30.5 million fewer people live in California).
This to-scale comparison of United Kingdom vs. California uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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