| |||

## Area | ||
---|---|---|

## Characteristic | ## acre | ## Notes | ||
---|---|---|---|---|

## Symbol | ac | |||

## Other Name | international-acre | |||

## Metric (SI) Equivalent | This equivalent and the one below are calculated from exact values. | |||

## Another Metric (SI) Equivalent with More Basic Units |
||||

## Metric (SI) Dimensions | length2 | |||

## Description in Terms of Other Units and Constants |
4840 yards2 | |||

## Unit Group |

## Characteristic | ## acre-US-survey( Used in the United States for some survey measurements ) | ## Notes | ||
---|---|---|---|---|

## Other Names |
ac-US-survey, survey-acre | |||

## Metric (SI) Equivalent | This equivalent and the one below are calculated from exact values. | |||

## Another Metric (SI) Equivalent with More Basic Units | ||||

## Metric (SI) Dimensions | length2 | |||

## Description in Terms of Other Units and Constants | 4840 yards-US-survey2 | |||

## Unit Group |

## Characteristic | ## are | ## Notes | ||
---|---|---|---|---|

## Symbol | a |
|||

## Metric (SI) Equivalent | This equivalent is exact. | |||

## Metric (SI) Dimensions | length2 |

## Characteristic | ## arpent-area( Quebec survey unit ) | ## Notes | ||
---|---|---|---|---|

## Metric (SI) Equivalent | This equivalent and the one below are calculated from exact values. | |||

## Another Metric (SI) Equivalent with More Basic Units | ||||

## Metric (SI) Dimensions | length2 | |||

## Description in Terms of Other Units and Constants |

## Characteristic | ## barn | ## Notes | ||
---|---|---|---|---|

## Symbol |
b | |||

## Metric (SI) Equivalent | This equivalent is exact. | |||

## Metric (SI) Dimensions | length2 |

## Characteristic | ## centare | ## Notes | ||
---|---|---|---|---|

## Symbol | ca | |||

## Other Name | centiare | |||

## Metric (SI) Equivalent | This equivalent is exact. | |||

## Metric (SI) Dimensions | length2 |

## Characteristic | ## circular-inch | ## Notes | ||
---|---|---|---|---|

## Symbol | cin | |||

## Other Name | cir-in | |||

## Metric (SI) Equivalent | ||||

## Metric (SI) Dimensions | length2 | |||

## Description in Terms of Other Units and Constants |

## Characteristic | ## circular-mil | ## Notes | ||
---|---|---|---|---|

## Symbol | cmil | |||

## Other Name | cir-mil | |||

## Metric (SI) Equivalent | ||||

## Metric (SI) Dimensions | length2 | |||

## Description in Terms of Other Units and Constants | pi * (mil-length / 2)2 |

## Characteristic | ## hectare | ## Notes | ||
---|---|---|---|---|

## Symbol | ha |
|||

## Other Name | hectoare | |||

## Metric (SI) Equivalent |
hectare is a metric unit | |||

## Another Metric (SI) Equivalent with More Basic Units | 10000 meters2 | This equivalent is exact. | ||

## Metric (SI) Dimensions | length2 |

## Characteristic | ## rood |
## Notes | ||
---|---|---|---|---|

## Metric (SI) Equivalent | This equivalent and the one below are calculated from exact values. | |||

## Another Metric (SI) Equivalent with More Basic Units | ||||

## Metric (SI) Dimensions | length2 | |||

## Description in Terms of Other Units and Constants | 40 rods2 |

## Characteristic | ## section | ## Notes | ||
---|---|---|---|---|

## Metric (SI) Equivalent | This equivalent is calculated from exact values. | |||

## Metric (SI) Dimensions | length2 | |||

## Description in Terms of Other Units and Constants |

## Characteristic | ## shed | ## Notes | ||
---|---|---|---|---|

## Metric (SI) Equivalent | This equivalent is exact. | |||

## Metric (SI) Dimensions | length2 |

## Characteristic | ## Thomson-cross-section |
## Notes | ||
---|---|---|---|---|

## Symbol | σe |
Use "sigma-e" for our conversion calculators. | ||

## Metric (SI) Equivalent | 6.6524587321×10-29 meters2 | |||

## Standard Uncertainty | ± 6×10-38 meters2 | |||

## Metric (SI) Dimensions | length2 |

## Characteristic | ## township( Used in the United States ) | ## Notes |
||
---|---|---|---|---|

## Metric (SI) Equivalent | This equivalent is calculated from exact values. | |||

## Metric (SI) Dimensions | length2 | |||

## Description in Terms of Other Units and Constants | (6 miles-US-survey)2 |