5 mi² to km² — 5 square miles in square kilometres
Exact 5 × 2.589988 = 12.949941
12 square kilometres 94 hectares 9,940 square metres 5,516 square centimetres
5 square miles in other units
| Square millimetres | 12,949,940,551,680 | mm² |
|---|---|---|
| Square centimetres | 129,499,405,516.8 | cm² |
| Square metres | 12,949,940.55 | m² |
| Ares | 129,499.41 | a |
| Hectares | 1,294.99 | ha |
| Square kilometres | 12.949941 | km² |
| Square inches | 20,072,448,000 | in² |
| Square feet | 139,392,000 | ft² |
| Square yards | 15,488,000 | yd² |
| Acres | 3,200 | ac |
mi² to km² at a glance
| Square miles | Square kilometres |
|---|---|
| 1 mi² | 2.589988 km² |
| 2 mi² | 5.179976 km² |
| 3 mi² | 7.769964 km² |
| 5 mi² | 12.949941 km² |
| 10 mi² | 25.899881 km² |
| 20 mi² | 51.799762 km² |
| 25 mi² | 64.749703 km² |
| 50 mi² | 129.499406 km² |
| 100 mi² | 258.998811 km² |
| 250 mi² | 647.497028 km² |
| 500 mi² | 1,294.99 km² |
| 1,000 mi² | 2,589.99 km² |
How to convert square miles to square kilometres
Multiply by 2.589988 — one square mile is 2.589988 square kilometres. That factor is exact: it comes from the definition of the units rather than from a measurement, so it will not change and does not need rounding.
Working 5 × 2.589988 = 12.949941
In words: about thirteen square kilometres.
What these units are
The square mile and the square kilometre are covered in the area unit guide, along with every other unit on this page.
Questions
How many square kilometres are in a square mile?
One square mile is 2.589988 square kilometres. This figure is exact — it comes from the definition of the unit, not a measurement.
What is 5 square miles in square kilometres?
5 square miles is 12.949941 square kilometres. The working is 5 × 2.589988 = 12.949941.
How big is an acre, really?
About 4,047 square metres, or roughly 70 by 58 metres if it were square — though it rarely is. The traditional definition was one chain by one furlong, the strip a team of oxen could plough in a day, which is why it is a long thin shape rather than a round number.
How many acres in a hectare?
A hectare is about 2.47 acres. The hectare is the tidier unit: it is exactly 10,000 square metres, or a square 100 metres on each side. Most of the world quotes land in hectares and only the English-speaking countries still lean on the acre.
Why isn't a square foot 12 square inches?
Because area scales with the square of length. A foot is 12 inches, so a square foot is 12 × 12 = 144 square inches. The same catch doubles again for volume, where a cubic foot is 1,728 cubic inches.
What area is a football pitch?
There is no single answer, which is why it is a poor unit despite being a popular one. FIFA allows pitches between roughly 4,050 and 10,800 square metres, so "the size of a football pitch" can vary by a factor of more than two.