ToolNestSquare Kilometers to Square Miles Converter
Convert square kilometers to square miles instantly with our free area converter. 1 square kilometer = 0.386102 mi² — type any value below and the result updates live.
Square Kilometers → Square Miles⇄ Swap: Square Miles → Square Kilometers
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Square Kilometers to Square Miles Formula
Square Miles = Square Kilometers × 0.386102 (Square Kilometers = Square Miles × 2.589988)
Area conversion for real estate, construction, and land — square inches, feet, yards, meters, kilometers, and miles, plus acres and hectares for larger parcels.
Square Kilometers to Square Miles Conversion Table
| Square Kilometers | Square Miles | |
|---|---|---|
| 1 km² | = | 0.386102 mi² |
| 2 km² | = | 0.772204 mi² |
| 5 km² | = | 1.930511 mi² |
| 10 km² | = | 3.861022 mi² |
| 25 km² | = | 9.652554 mi² |
| 50 km² | = | 19.305108 mi² |
| 100 km² | = | 38.610216 mi² |
About Square Kilometers and Square Miles
A square kilometer is one million square meters — the unit for city sizes, lakes, and country areas.
A square mile is 640 acres — the unit for city and county areas in the United States.
Frequently Asked Questions
How many square miles are in one square kilometer?
One square kilometer equals 0.386102 square miles. Multiply any square kilometers value by 0.386102 to convert it.
What is the formula for converting square kilometers to square miles?
Square Miles = Square Kilometers × 0.386102. To reverse it: square kilometers = square miles × 2.589988.
How do I convert square miles back to square kilometers?
Divide the square miles value by 0.386102 (equivalently, multiply by 2.589988). Or use our square miles-to-square kilometers converter going the other way.
Which is bigger, a square kilometer or a square mile?
A square mile is bigger — it takes 2.589988 square kilometers to make one square mile.