# Square KM to Square Miles Convert square kilometers to square miles with configurable decimal precision > Canonical page: https://elysiatools.com/en/tools/square-km-to-square-miles - **Category:** Math & Numbers - **Keywords:** square kilometers, square miles, area, conversion, km2, mi2 ## Overview Easily convert square kilometers (km²) to square miles (mi²) with our precise online area converter. This tool allows you to input any land or geographic area in square kilometers and instantly receive the equivalent value in square miles, complete with customizable decimal precision for highly accurate calculations. ## Inputs - **Square Kilometers** (text): e.g. 10 - **Decimal Precision** (number) ## When to use - When analyzing international real estate listings or land sizes that are documented in square kilometers but need to be understood in square miles. - When working on geographic, environmental, or geological research papers that require standardized imperial area measurements. - When comparing the total land area of cities, regions, or countries across different regional mapping standards. ## How it works - Enter the area value in square kilometers into the designated input field. - Set your preferred decimal precision from 0 to 10 decimal places to control the rounding of the output. - Click convert to run the calculation using the standard conversion factor of 1 square kilometer ≈ 0.386102 square miles. ## Use cases - Converting national park or forest reserve areas from metric to imperial units for travel guides. - Standardizing municipal boundary data for global urban planning reports. - Translating agricultural land sizes in scientific publications for North American audiences. ## Frequently asked questions ### What is the conversion formula from square kilometers to square miles? Multiply the square kilometer value by approximately 0.386102 to get the equivalent area in square miles. ### Can I control the decimal rounding of the conversion result? Yes, you can configure the decimal precision from 0 up to 10 decimal places to match your required level of accuracy. ### Is there a limit to the size of the area I can convert? No, the tool handles both very small fractional areas and extremely large regional or national land masses. ### What is the default decimal precision if I do not specify one? The tool defaults to a precision of 4 decimal places for standard calculations. ### Does this tool support converting square miles back to square kilometers? 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