# English wine cask units

Capacities of wine casks were formerly measured and standardised according to a specific system of English units.
The various units were historically defined in terms of the wine gallon so varied according to the definition of the gallon until the adoption of the Queen Anne wine gallon in 1706. In the United Kingdom and its colonies, the units were redefined with the introduction of the imperial system in 1826, whilst the Queen Anne wine gallon was adopted as the standard US gallon in 1836.
The major wine producing countries use barrels extensively and have developed standards at variance with the traditional English volumes: examples include a hogshead of 300 L (66 imp gal; 79 US gal), a barrique of 220 L (48 imp gal; 58 US gal) (Bordeaux), a barrel of 225 L (49 imp gal; 59 US gal) (Australia), a barrel of 230 L (51 imp gal; 61 US gal) (Burgundy) and a puncheon of 465 L (102 imp gal; 123 US gal).

## Casks
### Tun

The tun (Old English: tunne, Latin: tunellus, Middle Latin: tunna) is an English unit of liquid volume (not weight), used for measuring wine, oil or honey. It is typically a large vat or vessel, most often holding 252 wine gallons, but occasionally other sizes (e.g. 256, 240 and 208 gallons) were also used.

### Pipe or butt

The butt (from the medieval French and Italian botte) or pipe is half a tun, or exactly 105 imperial gallons (477.33945 L).
Tradition has it that George, Duke of Clarence, the brother of Edward IV of England, was drowned in a butt of malmsey on 18 February 1478. When James VI and I sailed to Norway in October 1589, his provisions included a pipe of sack. In Edgar Allan Poe's short story "The Cask of Amontillado", the narrator claims he has received "a pipe of what passes for Amontillado".

### Puncheon or tertian

The puncheon is a third of a tun. The term puncheon, shortened to pon in the United States, is thought to derive from the fact that it would have been marked by use of a punch to denote its contents. The unit was also known as a tertian (from the Latin word for "third").

### Hogshead

Of comparable size to the beer hogshead, the wine hogshead is equal to half a butt or a quarter of a tun.

### Tierce

Closely related to the modern oil barrel, the tierce is half a puncheon, a third of a butt, or a sixth of a tun.

### Barrel

The wine barrel is half a wine hogshead or an eighth of a tun.

### Rundlet

The rundlet is a seventh of a butt or a fourteenth of a tun.

## History

Originally, the tun was defined as 256 wine gallons. (This was the basis for calling 64 gallons a quarter.) At some time before the 15th century, it was reduced to 252 gallons, so as to be evenly divisible by other small integers, including seven. Note that a 252-gallon tun of wine has a mass of approximately 2060 pounds, between a short ton (2000 pounds) and a long ton (2240 pounds).
The tun is approximately the volume of a cylinder with both diameter and height of 42 inches, as the gallon was originally a cylinder with diameter of 7 inches and height of 6. The Queen Anne wine gallon of 231 cubic inches was adopted in 1707, and still serves as the definition of the US gallon. A US tun is thus the volume of a rectangular cuboid with dimensions 36 by 38.5 by 42 inches.
When the imperial system was introduced, the tun was redefined in the UK and its colonies as 210 imperial gallons, meaning the imperial tun remained evenly divisible by small integers, and there was also little change in the actual value of the tun.
| | comparisons | comparisons | comparisons | comparisons | comparisons | comparisons | comparisons | historically | imperial definitions | imperial definitions | US definitions | US definitions |
| measure | tuns | butts | puncheons | hogsheads | tierces | barrels | rundlets | litres | gallons | litres | gallons | litres |
| tun | 1 | ⁠1/2⁠ | ⁠1/3⁠ | ⁠1/4⁠ | ⁠1/6⁠ | ⁠1/8⁠ | ⁠1/14⁠ | 950–960 | 210 | 954.6789 | 252 | 953.923769568 |
| butt | 2 | 1 | ⁠2/3⁠ | ⁠1/2⁠ | ⁠1/3⁠ | ⁠1/4⁠ | ⁠1/7⁠ | 475–480 | 105 | 477.33945 | 126 | 476.961884784 |
| puncheon | 3 | ⁠1+1/2⁠ | 1 | ⁠3/4⁠ | ⁠1/2⁠ | ⁠3/8⁠ | ⁠3/14⁠ | 316–320 | 70 | 318.2263 | 84 | 317.974589856 |
| hogshead | 4 | 2 | ⁠1+1/3⁠ | 1 | ⁠2/3⁠ | ⁠1/2⁠ | ⁠2/7⁠ | 237–240 | ⁠52+1/2⁠ | 238.669725 | 63 | 238.480942392 |
| tierce | 6 | 3 | 2 | ⁠1+1/2⁠ | 1 | ⁠3/4⁠ | ⁠3/7⁠ | 158–160 | 35 | 159.11315 | 42 | 158.987294928 |
| barrel | 8 | 4 | ⁠2+2/3⁠ | 2 | ⁠1+1/3⁠ | 1 | ⁠4/7⁠ | 118–120 | ⁠26+1/4⁠ | 119.3348625 | ⁠31+1/2⁠ | 119.240471196 |
| rundlet | 14 | 7 | ⁠4+2/3⁠ | ⁠3+1/2⁠ | ⁠2+1/3⁠ | ⁠1+3/4⁠ | 1 | 68–69 | 15 | 68.19135 | 18 | 68.137412112 |