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Square Kilometers to Square Miles converter

Convert km² to mi² instantly. Type any value and get the result in square miles. 1 km² = 0.3861 mi².

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Area›km² → mi²
From
To
result below ↓
1 km²=
0.3861mi²
formula1 km² = 0.3861 mi²

Common square kilometers → square miles

=0.3861 mi²
=0.772201 mi²
=1.9305 mi²
=3.861 mi²
=7.72201 mi²
=19.305 mi²
=38.61 mi²
=193.05 mi²
=386.1 mi²

Need a different value? .

Convert the other way
Square Miles to Square Kilometers

How to convert square kilometers to square miles

To convert square kilometers to square miles, multiply the value by 0.3861.

Formula
mi² = km² × 0.3861

For example:

  • →5 km² = 1.9305 mi²
  • →100 km² = 38.61 mi²

Quick reference

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

When you need to convert km² to mi²

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

Related conversions

Square Miles to Square Kilometers
1 mi² = 2.59 km²
Square Kilometers to Square Centimeters
1 km² = 10B cm²
Square Kilometers to Square Meters
1 km² = 1,000,000 m²
Square Kilometers to Square Feet
1 km² = 10,763,900 ft²
Square Centimeters to Square Miles
1 cm² = 3.8610e-11 mi²
Square Meters to Square Miles
1 m² = 3.8610e-7 mi²
Square Feet to Square Miles
1 ft² = 3.5870e-8 mi²
Square Yards to Square Miles
1 yd² = 3.2283e-7 mi²
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