Square Miles to Square Km
Convert square miles to square kilometres instantly. Free sq miles to sq km converter.
Formula
sq km = sq mi × 2.58999
Common Conversions
How to Convert Square Miles to Square Km
1 sq mile = 2.5900 sq km. Multiply square miles by 2.59 to get square km. So 100 sq mi × 2.59 = 259 sq km. The factor is the square of the linear conversion: (1.609)² = 2.589988... rounded to 2.59 for everyday use.
Used for country/state areas, large geographical regions. UK total area: 94,058 sq mi = 243,610 sq km. London Greater area: 607 sq mi = 1,572 sq km. New York City: 302 sq mi = 783 sq km. Yellowstone National Park: 3,468 sq mi = 8,983 sq km.
Common Square Miles to Square Km
| Square Miles | Square Km |
|---|---|
| 1 sq mi | 2.59 sq km |
| 10 sq mi | 25.90 sq km |
| 50 sq mi | 129.50 sq km |
| 100 sq mi | 259.00 sq km |
| 500 sq mi | 1295.00 sq km |
| 1000 sq mi | 2590.00 sq km |
| 3793 sq mi (Yellowstone) | 9821.71 sq km |
| 94058 sq mi (UK total) | 243610.55 sq km |
Frequently Asked Questions
How big is the UK?
UK total: 94,058 sq mi = 243,610 sq km. England: 50,302 sq mi. Scotland: 30,090 sq mi. Wales: 8,022 sq mi. Northern Ireland: 5,460 sq mi. France for comparison: 248,573 sq mi - just slightly larger than UK total.
What's the largest country by area?
Russia: 6.6 million sq mi = 17.1 million sq km (twice the size of Canada and the USA combined). Canada: 3.86 million sq mi. USA: 3.79 million sq mi. China: 3.7 million sq mi. Brazil: 3.29 million sq mi. UK ranks 80th in world area.
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