Length
1 Inch = 2.54 cm
1 Foot = 12 inches or 30.48 cm
1 Yard = 3 feet or 91.44 cm
1 Perch = 5½ yards or about 5 metres
1 Chain = 22 yards = 66 feet = length of a cricket wicket or about
20 metres
1 Furlong = 10 chains = 220 yards = length of a furrow or about
200 metres
1 Mile = 8 furlongs = 1760 yards = 5280 feet or about 1600 metres
Area
1 Sq foot = 144 sq inches
1 Sq yard = 9 sq feet = 1296 sq inches or 0.836 sq metre
1 Sq Perch = 30¼ sq yards (simply referred to as a Perch in the Lambourne tithe award)
1 Rood = ¼ acre = 1,210 sq yards = 40 sq perch
1 Acre = 4 roods = 160 sq perch = 4840 sq yards or about 0.40 hectare
(eg. a premier league football pitch)
1 Square mile = 640 acres or 259 hectares or 2.59 Sq Km
Capacity
Weight
1 ounce (oz) = 16 drams
1 pound (lb) = 16 oz or 0.454 kg
1 stone = 14 lb
1 quarter = 28 lb
1 hundredweight (cwt) = 4 quarters = 112 lb or about 50 kilograms
1 ton = 20 cwt = 2240 lb or 1.016 tonne