Square Miles to Square Kilometers

1 mi² = 2.589988 km²

How to convert square miles to square kilometers

km² = mi² × 2.589988

Example: 5 mi² = 12.94994 km²

Square Miles to Square Kilometers conversion table

Square Miles (mi²)Square Kilometers (km²)
1 mi²2.589988 km²
2 mi²5.179976 km²
3 mi²7.769964 km²
4 mi²10.35995 km²
5 mi²12.94994 km²
6 mi²15.53993 km²
7 mi²18.12992 km²
8 mi²20.7199 km²
9 mi²23.30989 km²
10 mi²25.89988 km²
15 mi²38.84982 km²
20 mi²51.79976 km²
25 mi²64.7497 km²
30 mi²77.69964 km²
40 mi²103.5995 km²
50 mi²129.4994 km²
75 mi²194.2491 km²
100 mi²258.9988 km²
250 mi²647.497 km²
500 mi²1,294.994 km²
1,000 mi²2,589.988 km²

About the units

Square Miles: The square mile is an imperial and US customary unit of area equal to 640 acres, or about 2.59 square kilometers.

Square Kilometers: The square kilometer is a metric unit of area equal to 1,000,000 square meters, used for the area of cities, regions and countries.

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Frequently asked questions

How many square kilometers are in 1 square mile?

1 square mile equals 2.589988 square kilometers.

How many square miles are in 1 square kilometer?

1 square kilometer equals 0.3861022 square miles.

How do I convert square miles to square kilometers?

Use the formula km² = mi² × 2.589988.

What is 10 square miles in square kilometers?

10 square miles equals 25.89988 square kilometers.

Related conversions

Factors: NIST SP 811 · SI Brochure · NIST Handbook 44 — Updated