Rods, roods, firkins and furlongs — the old measurements refuse to die, because the documents that use them refuse to go away. Land deeds, wills, estate surveys, tithe maps, auction particulars, ship manifests: they all assume a reader who knows their hogsheads from their kilderkins. This tool converts between as many historical and obsolete units as can be given a reliable modern equivalent. Click any result to use it as the new starting value.