Square Miles to Square Kilometers converter
Free online square miles to square kilometers converter. Convert mi2 to km2 instantly in your browser. 100% client-side, no uploads, no account required.
Unit Converter is loading — interactive editor will appear here. Use examples below to try instantly once loaded.
Formula
Square Kilometers = Square Miles × conversion factor
See also
Frequently asked questions
How do I convert square miles to square kilometers?
Use the calculator on this page. Enter any value in square miles and the equivalent in square kilometers is computed instantly. The conversion uses the exact factor: 1 MI2 = KM2 × factor. The full formula is shown in the "Formula" section above.
Is the square miles to square kilometers conversion exact?
Yes, the conversion is computed with full floating-point precision and rounded to 10 significant digits by default. All math runs in your browser — your input is never uploaded, never stored, and never logged. The result is reproducible and matches standard reference values.
Can I convert in batch?
Yes. The Unit Converter on this site has a batch mode: paste one value per line and click "Convert Batch" to get every result in one go. The batch output is plain text you can copy.