Pennsylvania is about 2.1 times smaller than United Kingdom.

United Kingdom is approximately 243,610 sq km, while Pennsylvania is approximately 116,075 sq km, making Pennsylvania 47.65% the size of United Kingdom. Meanwhile, the population of United Kingdom is ~67.8 million people (55.1 million fewer people live in Pennsylvania).
This to-scale comparison of United Kingdom vs. Pennsylvania uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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