1 km²
0.3861 sq mi
Square km to Square Miles Converter (Square Kilometers to Square Miles)
1 square kilometer = 0.3861021585 square miles. To convert km² to sq mi, multiply by 0.3861021585, or divide by 2.58998811.
1 sq mi
2.59 km²
10 km²
3.861 sq mi
100 km²
38.6102 sq mi
How to convert Square km to Square Miles
1 square kilometer equals 0.3861021585 square miles, so the conversion is a single multiplication.
sq mi = km² × 0.3861021585
Example: 2 km² × 0.3861021585 = 0.7722 sq mi.
1 square kilometer in every area unit
Acres247.105 ac
Square Feet10,763,910.417 sq ft
Square Meters1,000,000 m²
Hectares100 ha
Square Miles0.3861 sq miSquare Yards1,195,990.046 sq yd
Square Inches1,550,003,100.006 sq in
Square Centimeters10,000,000,000 cm²
Square Millimeters1,000,000,000,000 mm²
Ares10,000 a
Related conversions
Calculators
Square km to Square Miles FAQ
How many square miles are in a square kilometer?
1 square kilometer = 0.3861021585 square miles.
How many square kilometers are in a square mile?
1 square mile = 2.58998811 square kilometers.
How do I convert km² to sq mi?
Use sq mi = km² × 0.3861021585. For example, 10 km² = 3.861 sq mi.
Can I print this Square km to Square Miles chart?
Yes. Use "Print / Save PDF" next to the converter for a one-page chart, or "Download CSV" to open it in Excel or Google Sheets.