Square Kilometers to Square Miles Converter

Divide square kilometers by about 2.59 to get square miles.

100 km² = 38.6102158542 mi²

Convert square miles to square kilometers instead

Formula

1 km² = 0.3861021585 mi²

square miles = square kilometers ÷ 2.5899881103

Worked example

Convert 100 square kilometers to square miles

  1. Divide by 2.5899881103
  2. 100 ÷ 2.5899881103 = 38.6102

100 km² = 38.6102 mi²

Good to know

One square mile is 2.589988110336 km² exactly. Manhattan’s land area is about 59 km², or 22.8 mi². Don’t divide by 1.609 (the length factor) — areas scale with the square of lengths, so the factor is 1.609344² ≈ 2.59.

Conversion table

Square kilometers to square miles conversion table
Square kilometers (km²)Square miles (mi²)
10.386102
2.591
51.93051
103.86102
259.65255
5019.3051
10038.6102
500193.051
1,000386.102
10,0003,861.02

About these units

Square kilometer (km²)
One million square meters, or 100 hectares.
Square mile (mi²)
A square 1 mile on each side: 640 acres, about 2.59 km².