Square Miles to Square Kilometers Converter
1 square mile = 2.589988 square kilometers
1 square kilometer = 0.3861022 square miles
How to convert square miles to square kilometers
To convert square miles to square kilometers, multiply the value in square miles by 2.58998811034.
km² = mi² × 2.58998811034
Example: 100 mi² × 2.58998811034 = 258.9988 km²
Square Miles to Square Kilometers conversion table
| Square Mile (mi²) | Square Kilometer (km²) |
|---|---|
| 1 mi² | 2.589988 km² |
| 2 mi² | 5.179976 km² |
| 3 mi² | 7.769964 km² |
| 4 mi² | 10.35995 km² |
| 5 mi² | 12.94994 km² |
| 6 mi² | 15.53993 km² |
| 7 mi² | 18.12992 km² |
| 8 mi² | 20.7199 km² |
| 9 mi² | 23.30989 km² |
| 10 mi² | 25.89988 km² |
| 12 mi² | 31.07986 km² |
| 15 mi² | 38.84982 km² |
| 20 mi² | 51.79976 km² |
| 25 mi² | 64.7497 km² |
| 30 mi² | 77.69964 km² |
| 40 mi² | 103.5995 km² |
| 50 mi² | 129.4994 km² |
| 60 mi² | 155.3993 km² |
| 70 mi² | 181.2992 km² |
| 75 mi² | 194.2491 km² |
| 80 mi² | 207.199 km² |
| 90 mi² | 233.0989 km² |
| 100 mi² | 258.9988 km² |
| 150 mi² | 388.4982 km² |
| 200 mi² | 517.9976 km² |
| 250 mi² | 647.497 km² |
| 500 mi² | 1,294.994 km² |
| 1,000 mi² | 2,589.988 km² |
About these units
Square Mile (mi²)
The square mile (mi²) is a unit of area used in both the imperial and US customary systems. 1 square mile equals 2,589,988.11 square meters. This value is exact by definition.
Square Kilometer (km²)
The square kilometer (km²) is a unit of area in the International System of Units (SI). 1 square kilometer equals 1,000,000 square meters. This value is exact by definition.
Frequently asked questions
What is 1 square mile in square kilometers?
1 square mile equals 2.589988 square kilometers.
How do I convert square miles to square kilometers?
To convert square miles to square kilometers, multiply the value in square miles by 2.58998811034. Example: 100 mi² × 2.58998811034 = 258.9988 km²
What is 100 mi² in square kilometers?
100 square miles equals 258.9988 square kilometers.