KM² to Square miles Converter
Convert square kilometers to square miles instantly. Free online calculator.
Quick reference:
1 km² = 0.3861021585 mi²
Tip: You can swap the direction to convert mi² → km².
About Square kilometers and Square miles
Square kilometers (km²) is a unit of length in the metric system. It is commonly used for everyday measurements such as body height, fabric, furniture, and small distances.
Square miles (mi²) is a unit of length in the imperial/US customary system. It is widely used in the United States and in many industries (construction, screens, tools) where inches are standard.
Conversion formulas
- 1 km² = 0.3861021585 mi²
- 1 mi² = 2.589988111 km²
Tip: You can swap the direction if you want to convert mi² → km².