Square miles to Square kilometres Converter
Convert square mile to square kilometre instantly. Type a value below — the result updates as you type.
When you need to convert square mile to square kilometre
Area conversions are essential when buying land, ordering flooring, turf or paint, or comparing property listings that quote space in different units across regions.
Typical values: 0.5 mi² is about 1.295 km², and 100 mi² works out to roughly 258.9988 km². Because the ratio is fixed at 2.59, you can scale any amount linearly — doubling the square miles doubles the square kilometres.
Estate agents, builders and gardeners each favour different area units, so a quick conversion keeps quotes and material orders consistent.
How to convert square mile to square kilometre
One square mile equals 2.59 square kilometres. To convert, multiply the number of square miles by 2.59:
square kilometres = square miles × 2.59
For example, 10 square miles × 2.59 = 25.8999 square kilometres.
Square miles to square kilometres conversion table
| Area (mi²) | Square kilometres (km²) |
|---|---|
| 1 mi² | 2.59 km² |
| 2 mi² | 5.18 km² |
| 3 mi² | 7.77 km² |
| 5 mi² | 12.9499 km² |
| 10 mi² | 25.8999 km² |
| 20 mi² | 51.7998 km² |
| 50 mi² | 129.4994 km² |
| 100 mi² | 258.9988 km² |
FAQ
How many square kilometres are in a square mile?
One square mile = 2.59 square kilometres.
How do I convert square kilometres back to square miles?
Divide by 2.59, or use the square kilometres to square miles converter.