How to use Sq Km to Sq Miles
- Type a value in square kilometers.
- The result in square miles appears instantly.
- Type in the second box to convert the other way.
How to convert square kilometers to square miles
Multiply the value in square kilometers by 0.386102. Formula: mi² = km² ÷ 2.59. Example: 10 km² × 0.386102 = 3.861 mi².
Common square kilometers to square miles conversions
5 km² = 1.9305 mi². 25 km² = 9.6526 mi². 50 km² = 19.3051 mi². 100 km² = 38.6102 mi².
Where is km² to mi² conversion used?
Area conversions are common in real estate (flat and plot sizes in square feet or square meters), farming and land records (acres and hectares), flooring and tiling estimates, and painting or construction quotes.
What are square kilometers?
A square kilometer is the area of a 1 km × 1 km square, equal to 100 hectares. It is used for the size of cities, countries, lakes and parks.
What are square miles?
A square mile is the area of a 1 mile × 1 mile square, equal to 640 acres or about 2.59 km². It is used for city and country sizes in the US and UK.
Square kilometers to square miles conversion table
| Square kilometers (km²) | Square miles (mi²) |
|---|---|
| 1 | 0.386102 |
| 2 | 0.772204 |
| 5 | 1.9305 |
| 10 | 3.861 |
| 20 | 7.722 |
| 50 | 19.3051 |
| 100 | 38.6102 |
| 200 | 77.2204 |
| 250 | 96.5255 |
| 500 | 193.0511 |
| 1,000 | 386.1022 |
| 1,500 | 579.1532 |
| 2,000 | 772.2043 |
| 5,000 | 1,930.51 |
| 10,000 | 3,861.02 |
Frequently asked questions
How many square miles are in 1 square kilometer?
1 square kilometer = 0.386102 square miles (1 km² = 0.386102 mi²).
How many square kilometers are in 1 square mile?
1 square mile = 2.59 square kilometers (1 mi² = 2.59 km²).
What is 10 km² in square miles?
10 km² = 3.861 mi².
What is 100 km² in square miles?
100 km² = 38.6102 mi².
Is the km² to mi² conversion exact?
Yes. Area factors come from exact length definitions (1 ft = 0.3048 m), so square feet, acres and hectares convert exactly. Results are rounded only for display.
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