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Square kilometres to Square miles Converter

Enter square kilometres to get square miles instantly. Works both ways.

1 square kilometre = 0.386102 square miles

How to convert square km to square miles

To convert square kilometres to square miles, multiply by 0.386102 (or divide by 2.58999). For example, 5 square km × 0.386102 = 1.93051 square miles.

Need it the other way? Convert square miles to square kilometres.

Square kilometres to Square miles at a glance

  • 1 square kilometre = 0.3861022 square miles
  • 5 square kilometres = 1.930511 square miles
  • 10 square kilometres = 3.861022 square miles
  • 50 square kilometres = 19.30511 square miles
  • 100 square kilometres = 38.61022 square miles
  • 1 square mile = 2.589988 square kilometres (the reverse)

Worked examples

25 square kilometres × 0.3861022 = 9.652554 square miles.

250 square kilometres × 0.3861022 = 96.52554 square miles.

1,500 square kilometres × 0.3861022 = 579.1532 square miles.

Converting back

To go from square miles back to square kilometres, divide by 0.3861022 (or multiply by 2.589988). For example, 100 square miles ÷ 0.3861022 = 258.9988 square kilometres.

Using a rounded factor

For a quick estimate you can use 0.39 in place of 0.3861022. That is accurate to within about 1.0%, which is fine for rough checks but not for exact work.

Square km to square miles chart

Square kilometresSquare miles
0.1 square km0.03861 square miles
0.25 square km0.096526 square miles
0.5 square km0.193051 square miles
1 square km0.386102 square miles
2 square km0.772204 square miles
3 square km1.15831 square miles
4 square km1.54441 square miles
5 square km1.93051 square miles
6 square km2.31661 square miles
7 square km2.70272 square miles
8 square km3.08882 square miles
9 square km3.47492 square miles
10 square km3.86102 square miles
15 square km5.79153 square miles
20 square km7.72204 square miles
25 square km9.65255 square miles
30 square km11.5831 square miles
40 square km15.4441 square miles
50 square km19.3051 square miles
75 square km28.9577 square miles
100 square km38.6102 square miles
250 square km96.5255 square miles
500 square km193.051 square miles
1,000 square km386.102 square miles

More area & land conversions

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Frequently asked questions

How many square miles are in one square kilometre?

There are 0.386102 square miles in one square kilometre.

How do I convert square km to square miles?

Multiply the value in square kilometres by 0.386102.

How many square kilometres are in one square mile?

There are 2.589988 square kilometres in one square mile.

What is 10 square kilometres in square miles?

10 square kilometres = 3.861022 square miles.

How do I convert square miles back to square kilometres?

Divide the value in square miles by 0.3861022, or multiply it by 2.589988.

Can I use a rounded factor for square kilometres to square miles?

For quick estimates, 0.39 is close (within about 1.0%). Use 0.3861022 when you need the full figure.