Convert square miles to square kilometers

1 mi² = 2.589988 km². Change the amount below, or read the formula and the reference table further down.

1 square mile equals

2.589988square kilometers

1 mi² = 2.589988 km²

The formula

Square miles and square kilometers both measure area from the same zero, so a single multiplier does the job.

km² = mi² × 2.58998811

Going the other way? Convert square kilometers to square miles.

Square miles to square kilometers table

Common values, rounded for reading.

Square miles (mi²)Square kilometers (km²)
12.59
25.18
37.77
410.36
512.9499
615.5399
718.1299
820.7199
923.3099
1025.8999
1538.8498
2051.7998
2564.7497
3077.6996
40103.6
50129.5
75194.25
100259
250647.5
5001,294.99
1,0002,589.99

Questions people ask

How many square kilometers are in a square mile?
One square mile equals 2.58998811 square kilometers.
How do I convert square miles to square kilometers by hand?
Multiply the number of square miles by 2.58998811. For a rough check, 2.6 is close enough for most everyday use.
What is 1 square mile in square kilometers?
1 square mile is 2.589988 square kilometers.

Calcuit generates this page from a unit table, so the factors here match every other page on the site.

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