Converters

Square Miles to Square Kilometers Converter

Convert square miles to square kilometers instantly. 1 square mile = 2.58999 square kilometers.

From

2.58999

1 mi² = 2.58999 km²

Common conversions

From 1 square miles

Square Meters (m²)2589990
Square Kilometers (km²)2.58999
Square Centimeters (cm²)2.5900e+10
Square Feet (ft²)27878400
Square Yards (yd²)3097600
Square Inches (in²)4.0145e+9
Acres (ac)640
Hectares (ha)258.999

Popular area conversions

Square Meters → Square Feet Square Feet → Square Meters Acres → Hectares Hectares → Acres Square Kilometers → Square Miles Square Miles → Square Kilometers Square Feet → Acres Square Meters → Square Yards

Method

How it works

Square Kilometers = Square Miles × 2.58998811

Multiply the number of square miles by 2.58998811 to get square kilometers. To go back, multiply by 0.3861021585. Examples: 1 mi² = 2.58999 km² · 5 mi² = 12.9499 km² · 10 mi² = 25.8999 km² · 100 mi² = 258.999 km².

FAQ

Frequently asked

How many square kilometers are in a square mile?

1 square mile = 2.58999 square kilometers.

What is the formula to convert square miles to square kilometers?

Square Kilometers = Square Miles × 2.58998811

Is this conversion exact?

The conversion factor between square miles and square kilometers is defined by international standards and is exact to at least 10 significant figures here.

Can I convert in the opposite direction?

Yes — use our Square Kilometers to Square Miles converter, or multiply your value by 0.3861021585.