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Square kilometer to Square mile

Convert Square kilometer to Square mile and get the exact value instantly.

About this conversion

To convert Square kilometer to Square mile, multiply the number of Square kilometer by 0.3861021585.

Area conversions come up in real estate, farming and construction, where floor plans, land parcels and material coverage may be quoted in square meters, square feet, acres or hectares.

Conversion table

Square kilometer (km²)Square mile (mi²)
1 km²0.3861021585 mi²
2 km²0.7722043171 mi²
5 km²1.930510793 mi²
10 km²3.861021585 mi²
100 km²38.61021585 mi²

How to use this converter

  1. Enter your Square kilometer value

    Type any number into the Square kilometer field. It starts at 1 so you can read the rate straight away.

  2. Read the Square mile result

    The amount in Square mile updates as you type, so there is no button to press and nothing to wait for.

  3. Swap or keep exploring

    Use the swap control to flip the direction, or pick a related conversion from the list below.

Frequently asked

How many Square mile are in one Square kilometer?
One Square kilometer equals 0.3861021585 mi². Enter any amount above to get an exact figure for your own value.
Is this converter accurate?
Yes. It uses the exact international definition of each unit and computes on your device, so the only rounding is for display.
Do you upload the numbers I enter?
No. The Square kilometer to Square mile conversion runs entirely in your browser tab, and nothing you type is sent to a server.
Does it work on my phone?
Yes. It runs in any modern mobile browser and keeps working offline once the page has loaded.

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