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Square Miles to Square Kilometers converter

Convert mi² to km² instantly. Type any value and get the result in square kilometers. 1 mi² = 2.59 km².

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Area›mi² → km²
From
To
result below ↓
1 mi²=
2.59km²
formula1 mi² = 2.59 km²

Common square miles → square kilometers

=2.59 km²
=5.18 km²
=12.95 km²
=25.9 km²
=51.8 km²
=129.5 km²
=259 km²
=1,295 km²
=2,590 km²

Need a different value? .

Convert the other way
Square Kilometers to Square Miles

How to convert square miles to square kilometers

To convert square miles to square kilometers, multiply the value by 2.59.

Formula
km² = mi² × 2.59

For example:

  • →5 mi² = 12.95 km²
  • →100 mi² = 259 km²

Quick reference

  • ▸1 mi² = 2.59 km²
  • ▸1 km² = 0.3861 mi²

When you need to convert mi² to km²

  • ·Real estate — comparing property sizes across markets.
  • ·Gardening and landscaping — sizing lawns, garden beds.
  • ·Painting and flooring — calculating material needs.
  • ·Construction — site plans and zoning.
  • ·Agriculture — field and crop area.

Frequently asked

How many square kilometers are in 1 square mile?
One square mile equals 2.59 square kilometers.
How do I convert mi² to km² in my head?
Multiply the value in square miles by 2.59 to get square kilometers.
What is the formula for square miles to square kilometers?
km² = mi² × 2.59.
What is the reverse — how many square miles in 1 square kilometer?
One square kilometer equals 0.3861 square miles.

Related conversions

Square Kilometers to Square Miles
1 km² = 0.3861 mi²
Square Miles to Square Centimeters
1 mi² = 25.9B cm²
Square Miles to Square Meters
1 mi² = 2,590,000 m²
Square Miles to Square Feet
1 mi² = 27,878,500 ft²
Square Centimeters to Square Kilometers
1 cm² = 1.0000e-10 km²
Square Meters to Square Kilometers
1 m² = 1.0000e-6 km²
Square Feet to Square Kilometers
1 ft² = 9.2903e-8 km²
Square Yards to Square Kilometers
1 yd² = 8.3613e-7 km²
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