Firkin
From Wikipedia, the free encyclopedia
A Firkin is an old English unit of volume. The name is derived from the Middle Dutch word vierdekijn, which means fourth, i.e. a fourth of a full-size barrel.
The word Firkin is also the NATO reporting name for the Su-47 Russian fighter aircraft.
Nor need you mind the serial ordeal
Of being watched from forty cellar holes
As if by eye pairs out of forty firkins.
— Robert Frost, "Directive"
For beer and ale a firkin is equal to 9 Imperial gallons (about 40.915 l) or a quarter of a barrel. Casks in this size (themselves called firkins) are the most common container for cask ale. The word "firkin" (as in "Fox & Firkin") is frequently considered a suitably atmospheric word by those naming an English-style pub — by implication, the establishment will thus be either a new pub in the UK or a foreign imitation of a British pub.
For wine the firkin had a larger size, namely a third of a tun. A tun being 210 gallons in the UK and 252 fluid gallons in the US, thus a wine firkin is about 318 l (318.226 or 317.975). It is also called tertian or, preferably, puncheon (in the US also shortened to pon).
Butter and soap used to be sold by the firkin, too. In these cases it was rather a measure of weight, 56 lb (25.4 kg) and 64 lb (29.0 kg) respectively.
| gallon | firkin | kilderkin | barrel | hogshead | (butt) | (tun) | Year designated | |
|---|---|---|---|---|---|---|---|---|
| 1 | tuns | |||||||
| 1 | 13⁄4 | butts | ||||||
| 1 | 3 | 51⁄4 | hogsheads | |||||
| 1 | 11⁄2 | 41⁄2 | 77⁄8 | barrels | ||||
| 1 | 2 | 3 | 9 | 153⁄4 | kilderkins | |||
| 1 | 2 | 4 | 6 | 18 | 311⁄2 | firkins | ||
| 1 | 8 | 16 | 32 | 48 | 144 | 252 | ale gallons (ale) | (1454) |
| = 4.62 | = 36.97 | = 73.94 | = 147.88 | = 221.82 | = 665.44 | = 1164.52 | litres (ale) | |
| 1 | 9 | 18 | 36 | 54 | 162 | 2831⁄2 | ale gallons (beer) | |
| = 4.62 | = 41.59 | = 83.18 | = 166.36 | = 249.54 | = 748.62 | = 1310.09 | litres (beer) | |
| 1 | 81⁄2 | 17 | 34 | 51 | ale gallons | 1688 | ||
| = 4.62 | = 39.28 | = 78.56 | = 157.12 | = 235.68 | litres | |||
| 1 | 9 | 18 | 36 | 54 | ale gallons | 1803 | ||
| = 4.62 | = 41.59 | = 83.18 | = 166.36 | = 249.54 | litres | |||
| 1 | 9 | 18 | 36 | 54 | imperial gallons | 1824 | ||
| = 4.55 | = 40.91 | = 81.83 | = 163.66 | = 245.49 | litres |
| gallon | rundlet | barrel | tierce | hogshead | firkin, puncheon, tertian | pipe, butt | tun | |
|---|---|---|---|---|---|---|---|---|
| 1 | tun | |||||||
| 1 | 2 | pipes, butts | ||||||
| 1 | 11⁄2 | 3 | firkins, puncheons, tertians | |||||
| 1 | 11⁄3 | 2 | 4 | hogsheads | ||||
| 1 | 11⁄2 | 2 | 3 | 6 | tierces | |||
| 1 | 11⁄3 | 2 | 22⁄3 | 4 | 8 | barrels | ||
| 1 | 13⁄4 | 21⁄3 | 31⁄2 | 42⁄3 | 7 | 14 | rundlets | |
| 1 | 18 | 311⁄2 | 42 | 63 | 84 | 126 | 252 | gallons (US/wine) |
| 3.79 | 68.14 | 119.24 | 158.99 | 238.48 | 317.97 | 476.96 | 953.92 | litres |
| 1 | 15 | 261⁄4 | 35 | 521⁄2 | 70 | 105 | 210 | gallons (imperial) |
| 4.55 | 68.19 | 119.3 | 159.1 | 238.7 | 318.2 | 477.3 | 954.7 | litres |
