How big is the United Kingdom compared with the United States?
The United States is about 39 times as big as the United Kingdom: 9 372 610 km² against 242 900 km².
How many times does it fit?
The United Kingdom would fit into the United States about 39 times. The number counts area, not shape: on a real map the smaller one would have to be cut up to fill the bigger one exactly.
Which has more people?
The United Kingdom has 66.5 million people, the United States has 326.7 million people. The United Kingdom is more crowded: about 274 people share each square kilometre, against 35 in the United States.
The two side by side
United Kingdom
- Capital
- London
- Continent
- Europe
- Area
- 242 900 km²
- People
- 66.5 million
United States
- Capital
- Washington D.C.
- Continent
- Americas
- Area
- 9 372 610 km²
- People
- 326.7 million
Why do maps get sizes wrong?
Most world maps on walls and in apps use the Mercator projection. It keeps shapes and directions right, which is why sailors loved it, but it stretches everything the further it is from the equator. Greenland looks as big as Africa on such a map, even though Africa is about fourteen times bigger. The United Kingdom lies further from the equator than the United States, so on a wall map it looks bigger than it really is.
The drawing on this page uses an equal-area projection centred on each place, so the two shapes can be compared fairly.
How big is a square kilometre?
A square kilometre (km²) is a square that measures one kilometre on each side. About 140 football pitches fit into it. So a country of 40 000 km² is as big as 40 000 such squares put together – that is more than five million football pitches.
Questions children ask
How big is the United Kingdom compared with the United States?
The United States is about 39 times as big as the United Kingdom: 9 372 610 km² against 242 900 km².
How many times does the United Kingdom fit into the United States?
The United Kingdom would fit into the United States about 39 times.
Where do more people live, in the United Kingdom or in the United States?
The United Kingdom has 66.5 million people, the United States has 326.7 million people.
Why does the size look different on a normal world map?
Most world maps on walls and in apps use the Mercator projection. It keeps shapes and directions right, which is why sailors loved it, but it stretches everything the further it is from the equator. Greenland looks as big as Africa on such a map, even though Africa is about fourteen times bigger. The United Kingdom lies further from the equator than the United States, so on a wall map it looks bigger than it really is.
Where these numbers come from
Areas: world-countries (ISO 3166, Natural Earth); continents rounded to textbook values, Europe to the Urals. Population: World Bank, 2018. Outlines: Natural Earth.
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