Square Kilometers to Square Miles

Convert km² to mi² instantly — with a table, common amounts, and a live calculator.

1 km² equals 0.386 mi².

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Result (mi²)0.386 mi²

km² to mi² table

km²mi²
0.25 km²0.0965 mi²
0.5 km²0.193 mi²
0.75 km²0.29 mi²
1 km²0.386 mi²
1.5 km²0.579 mi²
2 km²0.772 mi²
2.5 km²0.965 mi²
3 km²1.16 mi²
4 km²1.54 mi²
5 km²1.93 mi²
6 km²2.32 mi²
7 km²2.7 mi²
7.5 km²2.9 mi²
8 km²3.09 mi²
10 km²3.86 mi²
12 km²4.63 mi²
15 km²5.79 mi²
20 km²7.72 mi²
25 km²9.65 mi²
50 km²19.31 mi²
75 km²28.96 mi²
100 km²38.61 mi²

mi² to km² (reverse)

mi²km²
0.25 mi²0.647 km²
0.5 mi²1.29 km²
0.75 mi²1.94 km²
1 mi²2.59 km²
1.5 mi²3.88 km²
2 mi²5.18 km²
2.5 mi²6.47 km²
3 mi²7.77 km²
4 mi²10.36 km²
5 mi²12.95 km²
6 mi²15.54 km²
7 mi²18.13 km²
7.5 mi²19.42 km²
8 mi²20.72 km²
10 mi²25.9 km²
12 mi²31.08 km²
15 mi²38.85 km²
20 mi²51.8 km²
25 mi²64.75 km²
50 mi²129.5 km²
75 mi²194.25 km²
100 mi²259 km²

Common amounts

km²mi²
1/8 km²0.0483 mi²
1/4 km²0.0965 mi²
1/3 km²0.129 mi²
1/2 km²0.193 mi²
2/3 km²0.257 mi²
3/4 km²0.29 mi²
1 km²0.386 mi²
1 1/4 km²0.483 mi²
1 1/2 km²0.579 mi²
1 3/4 km²0.676 mi²
2 km²0.772 mi²
2 1/2 km²0.965 mi²

How it scales

0.40.81.21.501234km²

1 acre in other units

43560ft²4840yd²40470.4ha

The ratio at a glance

1 km²0.39 mi²

Imperial and metric area units

Square inches, square feet, square yards, acres, and square miles belong to the imperial/US system, while square centimeters, square meters, hectares, and square kilometers are metric. A square foot is defined as exactly 0.09290304 square meters, and an acre as exactly 4,046.8564224 square meters.

Area conversions are exact and rest on fixed factors — for more unit pairs, use our area conversion hub.

Where area conversions are used

Area conversions come up in property and land deals, flooring and paint estimates, and farming — switching between square metres, square feet, acres, and hectares.

  • One hectare is 10,000 m² (a square 100 m on each side); one acre is about 4,047 m².
  • Area scales with the square of length, so doubling a room's dimensions quadruples its floor area.
  • A football pitch is roughly 0.7 hectares, a useful mental yardstick for land size.

Frequently asked questions

How many mi² are in a km²?

1 km² equals 0.386 mi².

How many mi² are in 2 km²?

2 km² equal 0.772 mi².

How do I convert km² to mi²?

Divide the number of km² by 2.59 to get mi².

Is the km²-to-mi² conversion exact?

Yes. Area conversions are exact; the values here are only rounded to two decimal places.

Why are there imperial and metric area units?

Square inches, square feet, square yards, acres, and square miles belong to the imperial/US system, while square centimeters, square meters, hectares, and square kilometers are metric. All conversions rest on fixed, exact factors.

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