One square kilometer is about 0.386102 square miles. Multiply square kilometers by 0.3861 to get square miles. This is the direction for American and British readers who meet metric areas in news stories, atlases or environmental reports and want a size they can picture, such as the area of a city, a lake, a national park or a burned forest.
Formula
Square Kilometers to Square Miles conversion table
| Square Kilometers | Square Miles |
|---|---|
| 0.25 km² | 0.0965255 mi² |
| 0.5 km² | 0.193051 mi² |
| 1 km² | 0.386102 mi² |
| 2 km² | 0.772204 mi² |
| 3 km² | 1.1583 mi² |
| 4 km² | 1.5444 mi² |
| 5 km² | 1.9305 mi² |
| 6 km² | 2.3166 mi² |
| 7 km² | 2.7027 mi² |
| 8 km² | 3.0888 mi² |
| 9 km² | 3.4749 mi² |
| 10 km² | 3.861 mi² |
| 15 km² | 5.7915 mi² |
| 20 km² | 7.722 mi² |
| 25 km² | 9.6526 mi² |
| 30 km² | 11.5831 mi² |
| 40 km² | 15.4441 mi² |
| 50 km² | 19.3051 mi² |
| 60 km² | 23.1661 mi² |
| 70 km² | 27.0272 mi² |
| 75 km² | 28.9577 mi² |
| 80 km² | 30.8882 mi² |
| 90 km² | 34.7492 mi² |
| 100 km² | 38.6102 mi² |
| 250 km² | 96.5255 mi² |
| 500 km² | 193.0511 mi² |
| 1,000 km² | 386.1022 mi² |
Where you’ll use it
Almost every country outside the US reports city, region and protected-area sizes in square kilometers, and so do scientific papers and international agencies. A 100 km² reserve is about 38.61 square miles. US publications, as well as some UK ones, translate those figures for their readers. Geography students and travel writers deal with this conversion more than land buyers, since individual parcels are rarely large enough to quote in square kilometers.
Tip: Do not use 0.621, the kilometers-to-miles factor. Area needs that factor squared, which is about 0.386. Using 0.621 makes every result about 61% too large.