Square Miles to Square Kilometers

Convert square miles (mi²) to square kilometers (km²) with formulas, examples, and conversion tables.

mi²
km²
1 square miles (mi²) = 2.58998811 square kilometers (km²)
Round to:
Step-by-Step Solution
1Write the conversion factor:
1 square mile = 2.58998811 square kilometers
2Multiply the value by the conversion factor:
1 × 2.58998811 = 2.58998811
3Result:
1 square miles (mi²) = 2.58998811 square kilometers (km²)

How to Convert square miles to square kilometers

To convert square miles to square kilometers, multiply the value by 2.58998811.

The Formula

square kilometers = square miles × 2.58998811

Key Fact

1 square mile = 2.58998811 square kilometers

Tip: To convert square kilometers back to square miles, divide by 2.58998811.

square miles to square kilometers Table

square milessquare kilometers
1 mi²2.58998811 km²
2 mi²5.17997622 km²
5 mi²12.94994055 km²
10 mi²25.8998811 km²
20 mi²51.7997622 km²
25 mi²64.74970275 km²
50 mi²129.4994055 km²
100 mi²258.998811 km²
250 mi²647.4970275 km²
500 mi²1294.994055 km²
1000 mi²2589.98811 km²

1 square mile in Other Units

Unit1 mi² =
Square Miles to Square Kilometers2.58998811 km²
Square Miles to Hectares258.998811 ha
Square Miles to Square Meters2589988.11
Square Miles to Square Centimeters2.58998811e10 cm²
Square Miles to Square Millimeters2.58998811e12 mm²
Square Miles to Acres639.999434129 ac
Square Miles to Square Yards3097601.33329 yd²
Square Miles to Square Feet27878411.9996 ft²
Square Miles to Square Inches4.01448959948e9 in²
Square Miles to Ares25899.8811 a
Square Miles to Barns2.58998811e34 b

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