All converters
Square mile to Square kilometer
Convert Square mile to Square kilometer and get the exact value instantly.
About this conversion
To convert Square mile to Square kilometer, multiply the number of Square mile by 2.58998811.
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 mile (mi²) | Square kilometer (km²) |
|---|---|
| 1 mi² | 2.58998811 km² |
| 2 mi² | 5.179976221 km² |
| 5 mi² | 12.94994055 km² |
| 10 mi² | 25.8998811 km² |
| 100 mi² | 258.998811 km² |
How to use this converter
- Enter your Square mile value
Type any number into the Square mile field. It starts at 1 so you can read the rate straight away.
- Read the Square kilometer result
The amount in Square kilometer updates as you type, so there is no button to press and nothing to wait for.
- 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 kilometer are in one Square mile?
- One Square mile equals 2.58998811 km². 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 mile to Square kilometer 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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