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England
wool weights

Using the pound avoirdupois

							last
by 14 Edward III Stat 1 c21, 1340						sack(wool)	12
				wey		2	24
			hundredweight		1 5/8	3¼	39
			tod	4	6½	13	156
		stone	2	8	13	26	312
clove or nail		2	4	16	26	52	624
pound av.	7	14	28	112	182	364	4368
453.59 g	3.18 kg	6.35 kg	12.70 kg	50.80 kg	82.6 kg	165.1 kg	1981.3 kg

The pound avoirdupois = 16 ounces avoirdupois = 7000 Troy grains.

Using the libra mercatoria, as late as 14th c

							last
						sack (wool)	6
				wey		2	12
			hundredweight		2	3½	39
			tod	4	8	13	156
		stone	2	8	14	28	168
clove or nail		2	4	@16	32	52	624
London pound	6¼	12½	25	100	175	350	2100
466.55 g	kg	kg	kg	kg	kg	163.29 kg	kg

libra mercatoria or London pound = 15 Troy ounces = 7200 Troy grains.

Using the libra mercatoria, 13th c, with stone enlarged to 13 lbs

							last
						sack (wool)	6
				wey		@2	12
			hundredweight		1¾	3½	21
			tod	4	7	14	84
		stone	2	8	14	@28	168
clove or nail		2	4	@16	28	56	336
London pound	@6½	@13	26	104	182	@364	2184
466.55 g	kg	kg	kg	kg	kg	169.82 kg	kg

libra mercatoria or London pound = 15 Troy ounces = 7200 Troy grains.

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Last revised: 11 August 2001.