Square mile to Square kilometre Converter
Convert square mile to square kilometre instantly with a local, precise conversion. Enter decimals, zero, negative values where meaningful, or scientific notation.
How to convert square mile to square kilometre
1 mi² = 2.58998811034 km². Convert through square metre.
Worked examples
2 mi² equals 5.17997622067 km². Enter any valid finite value above for an immediate result.
Square mile to Square kilometre conversion table
| Square mile (mi²) | Square kilometre (km²) |
|---|---|
| 1 mi² | 2.58998811034 km² |
| 2 mi² | 5.17997622067 km² |
| 5 mi² | 12.9499405517 km² |
| 10 mi² | 25.8998811034 km² |
| 20 mi² | 51.7997622067 km² |
| 25 mi² | 64.7497027584 km² |
| 50 mi² | 129.499405517 km² |
| 100 mi² | 258.998811034 km² |
Reverse conversion: Square kilometre to Square mile Converter
Frequently asked questions
How do I convert square mile to square kilometre?
1 mi² = 2.58998811034 km². Convert through square metre.
Can I enter decimals or scientific notation?
Yes. The converter accepts decimals, grouped numbers and scientific notation, then formats the result without changing the underlying calculation.
Is this conversion performed online?
The page is delivered by the website, but the value conversion itself runs locally in your browser and is not submitted to a calculation service.