Imperial - UK units

With modern man now using the metric system there is sometimes a need to remember what the old units of measurement were, the common and not so common.
The UK table should really be the English table as some very old measurements were slightly different in Scotland, Ireland or Wales.
The metric conversions shown are approximate, see the main tables for accurate factors.

You can recalculate inch dimensions to metric using our inch/millimetre conversion calculator .

Table of Imperial - uk units

Imperial - UK Units of Length

1 inch ( in. or " )  =    about the width of a thumb = 25.4 mm
12 inches ( ins.)  =  1 foot about the length of a size 10 shoe = 305 mm
3 feet ( ft. )  =  1 yard about from nose to stretched finger = 0.91 m
1760 yards (yds)  =  1 mile ( m ) about 15 minutes walking = 1.61 km
      Less common units  
25 links  =  1 rod for measuring land = 5m
4 rod or perch  =  1 chain ( ch ) surveying; length of a cricket pitch = 20m
10 chains  =  1 furlong ( fg ) length of a furrow; horse racing = 200m
8 furlongs  =  1 mile ( m )   = 1610m
         

 

Imperial - UK units of Area

144 square inch (sq.in)  =  1 sq.foot about a paper napkin = 0.093 m2
9 square feet ( sq.ft)  =  1 sq.yard about the size of a card table = 0.84 m2
4840 sq.yards (sq.yds)  =  1 acre about a football pitch = 4047 m2
      Less common units  
30 1/4 sq.yds  =  1 pole (P) also called a square pole = 25.3 m2
40 poles  =  1 rood (R)   = 1012 m2
4 roods  =  1 acre   = 0.4 hectare

 

Imperial - UK units of Mass or Weight

16 drams ( dr )  =  1 ounce a tablespoon of sugar = 28 grams
16 ounces ( ozs.)  =  1 pound a bag of sugar = 0.45 kg
14 pounds ( lbs)  =  1 stone used in body weight = 6.35 kg
2 stone  =  1 quarter less common unit = 12.7 kg
4 quarters  =  1 hundredweight = 112 lb; bag of cement. = 50.8 kg
20 hundredweight (cwt)  =  1 ton = 2240 lb.; about 14 men = 1.016 tone

 

source:         http://www.simetric.co.uk/si_imperial.htm

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