# Acres to Hectares Conversion

Enter the area in acres below to get the value converted to hectares.

**Results in Hectares:**

## How to Convert Acres to Hectares

The fastest way to convert acres to hectares is to use this simple formula:

The area in hectares is equal to the area in acres multiplied by 0.404686.
Since one hectare is equal to 0.404686 acres^{[1]}, that's the conversion ratio used in the formula.

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

5 ac = (5 × 0.404686) = 2.023428 ha

Acres and hectares 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.^{[2]} 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.

## Hectares

One hectare is equal to 10,000 square meters,^{[3]} 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.

## Acre to Hectare Conversion Table

Acres | Hectares |
---|---|

1 ac | 0.404686 ha |

2 ac | 0.809371 ha |

3 ac | 1.2141 ha |

4 ac | 1.6187 ha |

5 ac | 2.0234 ha |

6 ac | 2.4281 ha |

7 ac | 2.8328 ha |

8 ac | 3.2375 ha |

9 ac | 3.6422 ha |

10 ac | 4.0469 ha |

11 ac | 4.4515 ha |

12 ac | 4.8562 ha |

13 ac | 5.2609 ha |

14 ac | 5.6656 ha |

15 ac | 6.0703 ha |

16 ac | 6.475 ha |

17 ac | 6.8797 ha |

18 ac | 7.2843 ha |

19 ac | 7.689 ha |

20 ac | 8.0937 ha |

21 ac | 8.4984 ha |

22 ac | 8.9031 ha |

23 ac | 9.3078 ha |

24 ac | 9.7125 ha |

25 ac | 10.12 ha |

26 ac | 10.52 ha |

27 ac | 10.93 ha |

28 ac | 11.33 ha |

29 ac | 11.74 ha |

30 ac | 12.14 ha |

31 ac | 12.55 ha |

32 ac | 12.95 ha |

33 ac | 13.35 ha |

34 ac | 13.76 ha |

35 ac | 14.16 ha |

36 ac | 14.57 ha |

37 ac | 14.97 ha |

38 ac | 15.38 ha |

39 ac | 15.78 ha |

40 ac | 16.19 ha |

## References

- National Oceanic and Atmospheric Administration, U.S. Coast Pilot 6, General Information, https://nauticalcharts.noaa.gov/publications/coast-pilot/files/cp6/CPB6_C01_WEB.pdf
- 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
- Cambridge Dictionary, hectare, https://dictionary.cambridge.org/us/dictionary/english/hectare