# Convert square kilometers to square miles

Enter the number of square kilometers you want to convert to square miles in the text box below. The conversion to area in square miles will update as you type.

{"answerString":"0.386","answerSymbol":"square miles"}## Precise decimal and fraction answers

The conversion in square miles rounded to six significant decimal places is **1 km ^{2} = 0.386102 sq mi.**
The precise fraction answer is

**.**

^{839}/_{2173}sq mi### Decimal Precision

Conversion from one to ten decimal places

- 1 km
^{2}=**0.4 sq mi** - 1 km
^{2}=**0.39 sq mi** - 1 km
^{2}=**0.386 sq mi** - 1 km
^{2}=**0.3861 sq mi** - 1 km
^{2}=**0.38610 sq mi** - 1 km
^{2}=**0.386102 sq mi** - 1 km
^{2}=**0.3861022 sq mi** - 1 km
^{2}=**0.38610216 sq mi** - 1 km
^{2}=**0.386102159 sq mi** - 1 km
^{2}=**0.3861021585 sq mi**

## Square kilometers to square miles conversion factor and formulas

FormulaThe conversion factor between square kilometers and square miles is 2.59. This represents the ratio of square kilometers per one square mile. To calculate the value in square miles, we can either divide by the conversion factor or multiply by its inverse.

### Division

To convert from square kilometers to square miles, divide square kilometers by 2.59.

The formula is expressed as:

*km ^{2} ÷ 2.59 = sq mi*

### Multiplication

Alternatively we can multiply by the inverse conversion factor to get the same result.

The inverse of 2.59 is 1/2.59 or 0.386.
To convert from square kilometers to square miles, multiply square kilometers by 0.386.

The formula is expressed as:

*km ^{2} × 0.386 = sq mi*

## About this conversion

Converting square kilometers to square miles is a conversion between units from separate unit systems - square kilometers are metric (SI) defined units while square miles are US Customary / UK Imperial .

## Reverse this conversion

Convert from square miles to square kilometers instead.

## 1 square kilometers to other area units

### Metric

- 1 km
^{2}=**100 ha** - 1 km
^{2}=**1 km**^{2} - 1 km
^{2}=**1,000,000 m**^{2} - 1 km
^{2}=**1×10**^{8}dm^{2} - 1 km
^{2}=**1×10**^{10}cm^{2} - 1 km
^{2}=**1×10**^{12}mm^{2} - 1 km
^{2}=**1×10**^{18}µ^{2} - 1 km
^{2}=**1×10**^{24}nm^{2}

### Imperial/U.S.

- 1 km
^{2}=**247.105 acre** - 1 km
^{2}=**0.386 sq mi** - 1 km
^{2}=**1,195,990.046 sq yd** - 1 km
^{2}=**1.076×10**^{7}sq ft - 1 km
^{2}=**1.55×10**^{9}sq in

## References and Citations

- International Bureau of Weights and Measures (BIPM) The International System of Units (SI)
- National Institute of Standards and Technology (NIST) General Tables of Units of Measurement

## Square kilometers to square miles conversion table

km^{2} |
sq mi |
---|---|

1 km^{2} | 0.386 sq mi |

2 km^{2} | 0.772 sq mi |

3 km^{2} | 1.158 sq mi |

4 km^{2} | 1.544 sq mi |

5 km^{2} | 1.931 sq mi |

6 km^{2} | 2.317 sq mi |

7 km^{2} | 2.703 sq mi |

8 km^{2} | 3.089 sq mi |

9 km^{2} | 3.475 sq mi |

10 km^{2} | 3.861 sq mi |

km^{2} |
sq mi |
---|---|

20 km^{2} | 7.722 sq mi |

30 km^{2} | 11.583 sq mi |

40 km^{2} | 15.444 sq mi |

50 km^{2} | 19.305 sq mi |

60 km^{2} | 23.166 sq mi |

70 km^{2} | 27.027 sq mi |

80 km^{2} | 30.888 sq mi |

90 km^{2} | 34.749 sq mi |

100 km^{2} | 38.61 sq mi |

1,000 km^{2} | 386.102 sq mi |

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