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)
↔ Square Kilometers to Square Miles

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 m²
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

Related Conversions

Square Meters to Square FeetSquare Feet to Square MetersAcres to HectaresHectares to AcresAcres to Square MetersSquare Meters to AcresSquare Kilometers to Square MilesSquare Feet to Square InchesSquare Inches to Square FeetHectares to Square Meters