# Convert Square Millimeters to Square Kilometers

Enter your square millimeter value in the form below to get the value calculated in square kilometers.

**Results in Square Kilometers:**

## How to Convert Square Millimeters to Square Kilometers Using an Easy Conversion Formula

Converting a square millimeter area measurement to a square kilometer measurement involves multiplying your area by the conversion ratio to find the result. A square millimeter is equal to 1.0E-12 square kilometers, so to convert simply multiply by 1.0E-12.

**For example:**

Learn more about finding the area of your space using our area calculator.

Square millimeters and square kilometers are both units used to measure area. Learn more about area and
find more area measurement conversion calculators.
A square millimeter is a metric measurement and can be abbreviated as *sq mm*, for example 1sq mm.
A square kilometer is a metric measurement and can be abbreviated as *sq km*, for example 1sq km.
Learn more about the metric system, including the common unit prefixes and how to convert between metric units.

## Square Millimeter Measurements and Equivalent Square Kilometer Conversions

Square Millimeters | Square Kilometers | Square Millimeters | Square Kilometers | Square Millimeters | Square Kilometers |
---|---|---|---|---|---|

1 | 0.0000000000010 | 21 | 0.000000000021 | 41 | 0.000000000041 |

2 | 0.0000000000020 | 22 | 0.000000000022 | 42 | 0.000000000042 |

3 | 0.0000000000030 | 23 | 0.000000000023 | 43 | 0.000000000043 |

4 | 0.0000000000040 | 24 | 0.000000000024 | 44 | 0.000000000044 |

5 | 0.0000000000050 | 25 | 0.000000000025 | 45 | 0.000000000045 |

6 | 0.0000000000060 | 26 | 0.000000000026 | 46 | 0.000000000046 |

7 | 0.0000000000070 | 27 | 0.000000000027 | 47 | 0.000000000047 |

8 | 0.0000000000080 | 28 | 0.000000000028 | 48 | 0.000000000048 |

9 | 0.0000000000090 | 29 | 0.000000000029 | 49 | 0.000000000049 |

10 | 0.000000000010 | 30 | 0.000000000030 | 50 | 0.000000000050 |

11 | 0.000000000011 | 31 | 0.000000000031 | 51 | 0.000000000051 |

12 | 0.000000000012 | 32 | 0.000000000032 | 52 | 0.000000000052 |

13 | 0.000000000013 | 33 | 0.000000000033 | 53 | 0.000000000053 |

14 | 0.000000000014 | 34 | 0.000000000034 | 54 | 0.000000000054 |

15 | 0.000000000015 | 35 | 0.000000000035 | 55 | 0.000000000055 |

16 | 0.000000000016 | 36 | 0.000000000036 | 56 | 0.000000000056 |

17 | 0.000000000017 | 37 | 0.000000000037 | 57 | 0.000000000057 |

18 | 0.000000000018 | 38 | 0.000000000038 | 58 | 0.000000000058 |

19 | 0.000000000019 | 39 | 0.000000000039 | 59 | 0.000000000059 |

20 | 0.000000000020 | 40 | 0.000000000040 | 60 | 0.000000000060 |

## More Area Conversions

- Convert to Square Miles Area
- 1sq mm is equal to 3.861E-13 square miles
- Convert to Acres Area
- 1sq mm is equal to 2.4711E-10 acres
- Convert to Square Yards Area
- 1sq mm is equal to 1.196E-6 square yards
- Convert to Square Feet Area
- 1sq mm is equal to 1.0764E-5 square feet
- Convert to Square Inches Area
- 1sq mm is equal to 0.00155 square inches
- Convert to Hectares Area
- 1sq mm is equal to 1.0E-10 hectares
- Convert to Ares Area
- 1sq mm is equal to 1.0E-8 ares
- Convert to Square Meters Area
- 1sq mm is equal to 1.0E-6 square meters
- Convert to Square Centimeters Area
- 1sq mm is equal to 0.01 square centimeters