# Acres to Square Millimeters Conversion

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

**Results in Square Millimeters:**

## How to Convert Acres to Square Millimeters

To convert an acre measurement to a square millimeter measurement, multiply the area by the conversion ratio. One acre is equal to 4,046,856,422.4 square millimeters, so use this simple formula to convert:

The area in square millimeters is equal to the acres multiplied by 4,046,856,422.4.

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

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

## Acres

One acre is defined as the area equal to a space that is one chain (66 ft) by one furlong (660 ft), or 10 square chains.^{[1]} That's equal to 43,560 square feet for those unfamiliar with those units of measure.

The acre is a US customary and imperial unit of area. Acres can be abbreviated as *ac*; for example, 1 acre can be written as 1 ac.

Try our acreage calculator to find the area of a plot of land in acres by locating the boundaries on a map.

## 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.

## Acre to Square Millimeter Conversion Table

Acres | Square Millimeters |
---|---|

0.000000001 ac | 4.0469 sq mm |

0.000000002 ac | 8.0937 sq mm |

0.000000003 ac | 12.14 sq mm |

0.000000004 ac | 16.19 sq mm |

0.000000005 ac | 20.23 sq mm |

0.000000006 ac | 24.28 sq mm |

0.000000007 ac | 28.33 sq mm |

0.000000008 ac | 32.37 sq mm |

0.000000009 ac | 36.42 sq mm |

0.0000000001 ac | 0.404686 sq mm |

0.000000001 ac | 4.0469 sq mm |

0.00000001 ac | 40.47 sq mm |

0.0000001 ac | 404.69 sq mm |

0.000001 ac | 4,047 sq mm |

0.00001 ac | 40,469 sq mm |

0.0001 ac | 404,686 sq mm |

0.001 ac | 4,046,856 sq mm |

0.01 ac | 40,468,564 sq mm |

0.1 ac | 404,685,642 sq mm |

1 ac | 4,046,856,422 sq mm |

## References

- National Institute of Standards and Technology, Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices, Handbook 44 - 2019 Edition, https://nvlpubs.nist.gov/nistpubs/hb/2019/NIST.HB.44-2019.pdf