Square Kilometers to Square Miles Converter

Square Kilometers to Square Miles Converter

Square Miles
—
Acres
—
1 km² = 0.386102 mi² · 1 km² = 247.105 acres

How to convert square kilometers to square miles

To convert square kilometers to square miles, multiply by 0.386102. For example, 10 km² × 0.386102 = 3.861 mi². Going the other way, multiply square miles by 2.58999 to get square kilometers.

To convert square kilometers to acres, multiply by 247.105. So 1 km² × 247.105 = 247.105 acres.

1 km² = 0.386102 mi² = 247.105 acres = 100 hectares. Square kilometers are used internationally for measuring large areas like countries and cities. Square miles are used in the US and UK.

Square kilometers to square miles conversion table

Square Kilometers (km²) Square Miles (mi²) Acres
1 km²0.386 mi²247.105 ac
2 km²0.772 mi²494.211 ac
5 km²1.931 mi²1235.53 ac
10 km²3.861 mi²2471.05 ac
50 km²19.305 mi²12,355.3 ac
100 km²38.610 mi²24,710.5 ac
500 km²193.051 mi²123,553 ac
1000 km²386.102 mi²247,105 ac

Frequently asked questions

How many square miles is 1 square kilometer?
1 km² = 0.386102 mi² = 247.105 acres = 100 hectares.
How many square kilometers is 1 square mile?
1 mi² = 2.58999 km² = 640 acres = 258.999 hectares.
How big is New York City in square kilometers?
New York City covers approximately 783 km² = 302 mi². Manhattan alone is about 59 km² = 22.8 mi².
How many acres is 1 square mile?
1 square mile = 640 acres = 2.58999 km² = 258.999 hectares.
How many square kilometers is 100 square miles?
100 mi² = 258.999 km². Calculation: 100 × 2.58999 = 258.999 km².