UnitConSquare Miles to Square Kilometers Converter
Convert square miles to square kilometers for international geographic reporting, scientific datasets, and comparing US state or country sizes in metric format. This conversion is standard in geography, cartography, and environmental science.
Formula
Multiply square miles by 2.58999 to get square kilometers. To reverse, divide sq km by 2.58999 to get square miles.
Quick reference
| Square Mile (mi²) | Square Kilometer (km²) |
|---|---|
| 1 | 2.589988 |
| 5 | 12.94994 |
| 10 | 25.89988 |
| 50 | 129.4994 |
| 100 | 258.9988 |
| 268 | 694.1168 |
| 500 | 1,294.994 |
| 1000 | 2,589.988 |
| 3797 | 9,834.185 |
| 50000 | 129,499.4 |
About these units
Square Mile
The square mile (1 statute mile × 1 statute mile = 2.58999 km²) is used in the US for measuring large land areas such as counties, states, and wildlife refuges. The USGS and Census Bureau report areas in square miles.
Square Kilometer
The square kilometer is the SI unit for large areas, used in international datasets. All United Nations statistics and most scientific publications report country and region sizes in km².