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The Age of George III

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Weights and measures before decimalisation

Before the decimalisation of almost everything, Great Britain worked in a variety of weights and measures. The currency was also very different from elsewhere in the world. The following tables are intended to try to explain some of the weights and measures.

Interestingly (perhaps) when legislation was passed to implement metric weights and measures, it applied only to pre-wrapped goods. If one went to an open-air market (for example), one would still buy a pound [1 lb] of apples (or whatever); in a supermarket, the weight would be metric. On a personal note, this has always caused me problems because most of my (elderly) knitting patterns are in Imperial measure and the goods themselves are sold in metric...

Imperial   Metric
 
Measurements of Length
1 inch  

2.54 cm

12 inches = 1 foot 30.5 cm
3 feet = 1 yard 91.44 cm
36 inches = 1 yard 91.44 cm
5½ yards or 16½ feet = 1 rod, perch or pole 5.0292 metres
22 yards or 100 links = 1 chain 20.12 metres
10 chains or 220 yards = 1 furlong 0.2 km
1760 yards)
80 chains)
8 furlongs)
= 1 mile 1.6 km
3 miles = 1 league  
 
Measurements of weight
1 oz. [ounce]   28.35 grammes
16 oz
= 1 lb. [pound]
0.45 kilogram
14 lbs.
= 1 stone
6.35 kilograms
2 stones
= 1 quarter
12.70 kilograms
4 quarters
= 1 cwt [hundredweight]
50.80 kilograms
20 cwt.
= 1 ton
1.016 tonnes
     
Liquid Measure
1 gill = ¼ pint 0.14 l
4 gills = 1 pint 0.57 l
2 pints = 1 quart 1.13 litre
4 quarts = 1 gallon 4.54 litres
52½ gallons = 1 hogshead 245.49 litres
     
Dry Measure

NB In the UK, there is only one set of volume units for both dry and liquid measure.

1 gill   0.14 l
4 gills = 1 pint 0.57 ml
2 pints = 1 quart 1.13 litre
4 quarts = 1 gallon 4.54 litres
2 gallons = 1 peck 9.1 litres
4 pecks = 1 bushel 36.4 litres

The following table is taken from THIS website which gives a great deal of information about the history of weights and measures.

Metric Imperial cubic Gallons Table
pin 20.46 litre 0.72 cu foot 4.5 gallons 4.5 gallons = 1 pin
firkin 40.91 litre 1.44 cu foot 9 gallons 2 pins = 1 firkin
kilderkin 81.83 litre 2.89 cu foot 18 gallons 2 firkins = 1 kilderkin
barrel 163.29 litre 5.78 cu foot 36 gallons 2 kilderkins = 1 barrel
puncheon 327.32 litre 11.56 cu foot 72 gallons 2 barrels = 1 puncheon
tun 981.96 litre 34.68 cu foot 216 gallons 3 puncheons = 1 tun
hogshead 245.49 litre 8.67 cu foot 54 gallons 6 firkins = 1 hogshead
butt 490.98 litre 17.34 cu foot 108 gallons 2 hogshead = 1 butt
2 butts = 1 ton (or tun)

 


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Last modified 12 December, 2018

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