Sq Miles to Sq Km Converter
Convert sq miles to sq km instantly. Enter any value and get the result. Includes a conversion table and the exact formula.
| Sq Miles | Sq Km |
|---|
How to convert sq miles to sq km
Enter your value
Type the number of sq miles you want to convert into the left box. The result in sq km appears instantly in the right box. You can also type into the right box to convert in the other direction.
Use the swap button
Click the ⇄ Swap button to reverse the conversion — Sq Km to Sq Miles. Your current value carries across so you don't have to re-enter anything.
About Sq Miles and Sq Km
sq miles and sq km are both units of area. Use this converter to switch between them instantly.
1 sq mile = 2.59 km². Greater London = 1,572 km² ≈ 607 sq miles. Manhattan = 87.5 km² ≈ 34 sq miles. The continental US = 9.8 million km² = 3.8 million sq miles.
| Sq Miles | Sq Km |
|---|---|
| 1 | 2.59 |
| 2 | 5.18 |
| 5 | 12.95 |
| 10 | 25.9 |
| 50 | 129.5 |
| 100 | 259 |
Frequently asked questions
How do I convert sq miles to sq km?
To convert sq miles to sq km, multiply by 2.58999. Or use the calculator above for instant results.
How many sq km are in 1 sq miles?
1 sq miles equals 2.58999 sq km.
Is the sq miles to sq km converter free?
Yes, the sq miles to sq km converter is completely free with no sign-up required, no downloads, and it works offline once the page has loaded.