# Mass Properties Window, Basic Properties

This part of the Mass Properties window is always displayed. The exact items displayed on the left side vary depending on the last element measured and the tool used to measure it.

Setting | Description |
---|---|

Length | Length, in working units, of a linear element. For surfaces, the length of the wireframe geometry. |

Perimeter | Perimeter, in working units, of a closed planar element. |

Surface Area | Area of a closed planar element or the surface area of solids in square working units. |

Volume | Volume enclosed by a solid, in cubic working units. |

Mass | Mass, computed by multiplying the Length, Surface Area, or Volume by the Mass Per <Length/Area/Volume> setting. |

Centroid | Coordinates, in working units, of the center of mass. Indicated graphically with a highlighted cross hair if the Display Centroid tool setting is on. |