Convert Board Foot (board foot) to Tun (tun) instantly.
About these units
Board Foot (board foot)
A board foot is a unit of volume used in lumber, defined as a board measuring 1 foot long × 1 foot wide × 1 inch thick, equal to 144 cubic inches, or about 2.36 liters. The unit reflects a material-centric approach to volume: rather than measuring empty space, the board foot measures solid wood content, crucial for pricing logs, boards, and woodworking materials. Forestry operations, sawmills, and lumber yards rely heavily on board-feet calculations to estimate yields from logs, determine pricing, and evaluate timber resources. The unit persists due to deep integration with North American construction and carpentry practices.
Tun (tun)
A tun is a historical large cask unit commonly used in the wine and brewing industries, typically defined as 252 imperial gallons, or roughly 954 liters. It represented one of the largest standardized cask sizes in medieval and early modern Europe. Originally used for transporting wine, ale, and oil, the tun played an important role in commerce and maritime trade. Because taxes and tariffs were often levied per tun, its definition became central to economic regulation. The size also reflected the maximum volume that could be reliably transported in wooden casks without structural failure. Though obsolete today, the tun provides valuable insight into historical logistics, taxation, and the evolution of standardized container sizes in European trade networks.