Kilderkin

The kilderkin is an old English unit of volume equal to half a barrel or two firkins. It was used as standard size for brewery casks. The word kilderkin comes from Dutch for a small cask. The kilderkin has historically been in the general range of 16 to 18 gallons. Based on the current imperial barrel of 36 gallons the following conversions are possible.

1 kilderkin	= ½ barrel
	= 2 firkins
	= 18 imperial gallons
	= 81.82962 litres
	≈2.890 cubic feet

English casks of ale and beer

gallon	firkin	kilderkin	barrel	hogshead		Year designated
				1	hogsheads
			1	1 1⁄2	barrels
		1	2	3	kilderkins
	1	2	4	6	firkins
1	8	16	32	48	ale gallons	(1454)
= 4.621 l	= 36.97 l	= 73.94 l	= 147.9 l	= 221.8 l
1	9	18	36	54	beer gallons
= 4.621 l	= 41.59 l	= 83.18 l	= 166.4 l	= 249.5 l
1	8+1⁄2	17	34	51	ale gallons	1688
= 4.621 l	= 39.28 l	= 78.56 l	= 157.1 l	= 235.7 l
1	9	18	36	54	ale gallons	1803
= 4.621 l	= 41.59 l	= 83.18 l	= 166.4 l	= 249.5 l
1	9	18	36	54	imperial gallons	1824
= 4.546 l	= 40.91 l	= 81.83 l	= 163.7 l	= 245.5 l