1 km² = 0.386102 mi² (square kilometer → square mile)
1 km² = 0.386102 mi²
1 square kilometer equals 0.386102 square miles. To convert square kilometers to square miles, multiply the square kilometer value by 0.386102. For quick reference: 1 km² = 0.386102 mi², 5 km² = 1.93051 mi², 10 km² = 3.86102 mi², 100 km² = 38.6102 mi².
Square miles = Square kilometers × 0.386102Square kilometers to square miles divides by 2.589988 (1 sq mi = 2.589988110336 km² exactly, from 1.609344²). Turkey's 783,562 km² is 302,535 sq mi; a 100 km² lake is 38.6 sq mi. This is the geography-class conversion — country and city areas quoted in km² everywhere except the US, which uses square miles. The linear shortcut (÷1.6) is the classic error here: it makes areas look 60 % bigger than they are, because area scales with the square of the factor.
Start with your value in square kilometers.
Multiply the square kilometer value by 0.386102. This is the exact conversion factor from square kilometers to square miles.
The product is your value in square miles. For example, 5 km² × 0.386102 = 1.93051 mi².
The exact factor from square kilometers to square miles is 0.386102.
Square miles = Square kilometers × 0.386102
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Square kilometers (km²) | Square miles (mi²) |
|---|---|
| 0.1 km² | 0.03861 mi² |
| 0.25 km² | 0.096526 mi² |
| 0.5 km² | 0.19305 mi² |
| 1 km² | 0.3861 mi² |
| 2 km² | 0.7722 mi² |
| 3 km² | 1.1583 mi² |
| 4 km² | 1.5444 mi² |
| 5 km² | 1.9305 mi² |
| 6 km² | 2.3166 mi² |
| 7 km² | 2.7027 mi² |
| 8 km² | 3.0888 mi² |
| 9 km² | 3.4749 mi² |
| 10 km² | 3.861 mi² |
| 12 km² | 4.6332 mi² |
| 15 km² | 5.7915 mi² |
| 20 km² | 7.722 mi² |
| 25 km² | 9.6526 mi² |
| 30 km² | 11.583 mi² |
| 40 km² | 15.444 mi² |
| 50 km² | 19.305 mi² |
| 60 km² | 23.166 mi² |
| 70 km² | 27.027 mi² |
| 75 km² | 28.958 mi² |
| 80 km² | 30.888 mi² |
| 90 km² | 34.749 mi² |
| 100 km² | 38.61 mi² |
| 120 km² | 46.332 mi² |
| 150 km² | 57.915 mi² |
| 200 km² | 77.22 mi² |
| 250 km² | 96.526 mi² |
| 300 km² | 115.83 mi² |
| 400 km² | 154.44 mi² |
| 500 km² | 193.05 mi² |
| 600 km² | 231.66 mi² |
| 750 km² | 289.58 mi² |
| 800 km² | 308.88 mi² |
| 1000 km² | 386.1 mi² |
| 1200 km² | 463.32 mi² |
| 1500 km² | 579.15 mi² |
| 2000 km² | 772.2 mi² |
| 2500 km² | 965.26 mi² |
| 3000 km² | 1158.3 mi² |
| 4000 km² | 1544.4 mi² |
| 5000 km² | 1930.5 mi² |
| 7500 km² | 2895.8 mi² |
| 10000 km² | 3861 mi² |
| 20000 km² | 7722 mi² |
| 50000 km² | 19305 mi² |
| 100000 km² | 38610 mi² |
| 1000000 km² | 386102 mi² |
Manhattan is about 59 km². Lake Geneva is about 580 km². In square miles, that gives you: 1 km² = 0.386102 mi², 10 km² = 3.86102 mi², 100 km² = 38.6102 mi².
The square kilometer equals one million square meters — the standard unit for city, region, and country areas in metric countries. Manhattan is about 59 km²; Istanbul is about 5,461 km²; Turkey is about 783,562 km². One km² equals exactly 100 hectares or about 0.386 square miles.
The square mile is the imperial unit for large land areas, standard in US geography and census data. One square mile is exactly 2.589988110336 km² (1.609344 km squared), or 640 acres — the basis of the US Public Land Survey System's square-mile 'sections'. Los Angeles covers about 469 square miles.