Tun (unit)

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Tun is a unit used in US fluid measure. Its symbol is US tu.[1] Tun was also a US unit of capacity for wine.[2]

Other usages refer English wine cask units

Definition[edit]

252 gallons.[1]

Conversion[edit]

1 Tun ≡ 4 Hogshead[1]

1 Tun ≡ 252 gallons[1]

1 Tun ≡ 0.953923769568 m3

Related units[edit]

Standard tuns of wine came to serve as a measure of a ship's weight capacity. The weight of a tun of wine is approximately a long ton, which is 2240 pounds.[3]

References[edit]

  1. ^ a b c d Cardarelli, F. (2003). Encyclopaedia of Scientific Units, Weights and Measures. Their SI Equivalences and Origins. London: Springer. p. 43. ISBN 978-1-4471-1122-1. 
  2. ^ Cardarelli, F. (2003). Encyclopaedia of Scientific Units, Weights and Measures. Their SI Equivalences and Origins. London: Springer. p. 49. ISBN 978-1-4471-1122-1. 
  3. ^ "Naval Architecture for All". United States Bureau of Transportation Statistics. Retrieved October 13, 2008. . "Historically, a very important and standard cargo for European sailing vessels was wine, stored and shipped in casks called tuns. These tuns of wine, because of their uniform size and their universal demand, became a standard by which a ship's capacity could be measured. A tun of wine weighed approximately 2,240 pounds, and occupied nearly 60 cubic feet." (Gillmer, Thomas (1975). Modern Ship Design. United States Naval Institute.) "Today the ship designers standard of weight is the long ton which is equal to 2,240 pounds."