# Convert Square Millimeters to Hectares

Enter the area in square millimeters below to get the value converted to hectares.

**Results in Hectares:**

## How to Convert Square Millimeters to Hectares

To convert a square millimeter measurement to a hectare measurement, multiply the area by the conversion ratio. One square millimeter is equal to 1.0E-10 hectares, so use this simple formula to convert:

The area in hectares is equal to the square millimeters multiplied by 1.0E-10.

**For example,**here's how to convert 5 square millimeters to hectares using the formula above.

Square millimeters and hectares are both units used to measure area. Keep reading to learn more about each unit of measure.

## Square Millimeters

One square millimeter is equal to the area of a square with edges that are 1 millimeter in length.

The square millimeter, or square millimetre, is a multiple of the square meter, which is the SI derived unit for area. In the metric system, "milli" is the prefix for 10^{-3}. A square millimeter is sometimes also referred to as a square mm. Square millimeters can be abbreviated as *sq mm*, and are also sometimes abbreviated as *mm²*. For example, 1 square millimeter can be written as 1 sq mm or 1 mm².

## Hectares

One hectare is equal to 10,000 square meters, or the area of a square with 100 meter sides.

The hectare is an SI accepted unit for area for use with the metric system. In the metric system, "hecto" is the prefix for 10^{2}. Hectares can be abbreviated as *ha*, for example 1 hectare can be written as 1 ha.

## Square Millimeter Measurements and Equivalent Hectare Conversions

Square Millimeters | Hectares |
---|---|

1 sq mm | 0.0000000001 ha |

2 sq mm | 0.0000000002 ha |

3 sq mm | 0.0000000003 ha |

4 sq mm | 0.0000000004 ha |

5 sq mm | 0.0000000005 ha |

6 sq mm | 0.0000000006 ha |

7 sq mm | 0.0000000007 ha |

8 sq mm | 0.0000000008 ha |

9 sq mm | 0.0000000009 ha |

10 sq mm | 0.000000001 ha |

11 sq mm | 0.0000000011 ha |

12 sq mm | 0.0000000012 ha |

13 sq mm | 0.0000000013 ha |

14 sq mm | 0.0000000014 ha |

15 sq mm | 0.0000000015 ha |

16 sq mm | 0.0000000016 ha |

17 sq mm | 0.0000000017 ha |

18 sq mm | 0.0000000018 ha |

19 sq mm | 0.0000000019 ha |

20 sq mm | 0.000000002 ha |

21 sq mm | 0.0000000021 ha |

22 sq mm | 0.0000000022 ha |

23 sq mm | 0.0000000023 ha |

24 sq mm | 0.0000000024 ha |

25 sq mm | 0.0000000025 ha |

26 sq mm | 0.0000000026 ha |

27 sq mm | 0.0000000027 ha |

28 sq mm | 0.0000000028 ha |

29 sq mm | 0.0000000029 ha |

30 sq mm | 0.000000003 ha |

31 sq mm | 0.0000000031 ha |

32 sq mm | 0.0000000032 ha |

33 sq mm | 0.0000000033 ha |

34 sq mm | 0.0000000034 ha |

35 sq mm | 0.0000000035 ha |

36 sq mm | 0.0000000036 ha |

37 sq mm | 0.0000000037 ha |

38 sq mm | 0.0000000038 ha |

39 sq mm | 0.0000000039 ha |

40 sq mm | 0.000000004 ha |

## More Square Millimeter Area Conversions

**US Customary**

- Convert to Square Miles
- 1 sq mm is equal to 3.861E-13 square miles
- Convert to Acres
- 1 sq mm is equal to 2.4711E-10 acres
- Convert to Square Yards
- 1 sq mm is equal to 1.196E-6 square yards
- Convert to Square Feet
- 1 sq mm is equal to 1.0764E-5 square feet
- Convert to Square Inches
- 1 sq mm is equal to 0.00155 square inches

**SI Units**

- Convert to Square Kilometers
- 1 sq mm is equal to 1.0E-12 square kilometers
- Convert to Square Meters
- 1 sq mm is equal to 1.0E-6 square meters
- Convert to Square Centimeters
- 1 sq mm is equal to 0.01 square centimeters

**Other Metric Units**

- Convert to Ares
- 1 sq mm is equal to 1.0E-8 ares