Convert Square Mile to Square Kilometre
Instantly convert Square Mile (mi²) to Square Kilometre (km²). Free and accurate.
About This Conversion
What is a Square Mile to Square Kilometre conversion?
One square mile (mi²) is equal to 2.58998811 square kilometre (km²). This relationship is fixed by international measurement standards and does not change. To convert any number of square mile to square kilometre, multiply your value by 2.58998811; to go the other way, divide by 2.58998811.
How to convert Square Mile to Square Kilometre
The conversion formula is: 1 mi² = 2.58998811 km². Enter any value into the converter above and the result updates instantly. The formula is also shown alongside the answer so you can check the working or use it in your own calculations.
Where is this conversion used?
Area conversions are critical in real estate, agriculture, land surveying, urban planning, and interior decoration. Metric units include square metres and hectares; imperial units include square feet, acres, and square miles. Estate agents, farmers, architects, cartographers, and garden designers depend on area conversions. In the UK, residential floor space is usually quoted in square feet or square metres, while agricultural land is measured in acres or hectares.
Helpful tip
One football pitch is approximately 7,140 square metres (1.76 acres or 0.714 hectares) — a useful mental reference when estimating large areas.
Formula
1 mi² = 2.58998811 km²
mi² to km² Conversion Table
| mi² | km² |
|---|---|
| 0.1 mi² | 0.258998811 km² |
| 0.5 mi² | 1.29499406 km² |
| 1 mi² | 2.58998811 km² |
| 2 mi² | 5.17997622 km² |
| 5 mi² | 12.94994055 km² |
| 10 mi² | 25.8998811 km² |
| 20 mi² | 51.79976221 km² |
| 25 mi² | 64.74970276 km² |
| 50 mi² | 129.49940552 km² |
| 100 mi² | 258.99881103 km² |
| 250 mi² | 647.49702758 km² |
| 500 mi² | 1,294.994055 km² |
| 1000 mi² | 2,589.98811 km² |