**Unit** |
**Abbreviation** |
**Description** |

Long Tons (UK) conversion |
T (long) |
A long ton is a British measurement and equivilent to 2,240 pounds. Not to be confused with the US "short ton" |

Short Tons (US) conversion |
T (short) |
United States measurement also known as a short ton that equals 2,000 pounds |

Short Hundredweights (US) conversion |
hw (short) |
This US measurement is equivelent to one hundred pounds |

Long Hundredweights (UK) conversion |
hw (long) |
Before approximately the 14th century there were two hundredweights in England, one of 100 pounds, and one of 108 pounds. In 1340, King Edward III changed the value of the stone from 12? pounds to 14 pounds. Since a hundredweight is 8 stones, the 100-pound hundredweight became 112 pounds. |

Stones conversion |
st |
A British measurement of mass that equals fourteen pounds |

**Pounds conversion** |
lb |
A unit of mass equal to 16 ounces |

Troy Pounds conversion |
t.p. |
An apothecary weight equal to 12 ounces or 373.242 grams |

Troy Ounces conversion |
t.oz |
A unit of apothecary weight equal to 480 grains or one twelfth of a troy pound |

**Ounces conversion** |
oz |
A unit of weight equal to one sixteenth of a pound or 16 drams or 28.349 grams |

Pennyweights conversion |
dwt |
A measure of Troy weight equalling 24 grains or the twentieth part of a Troy ounce (there are 12 ounces in a pound Troy). Pennyweight is usually abbreviated dwt. |

Grains conversion |
grains |
1/7000 pound; equals a troy grain or 64.799 milligrams |