Old colonial days of measurements and currency
   In Australia, early measurement for land was done with a unit known as a 'chain', being the length of a cricket pitch.

 

     
Surveyors at work in 1865, using “metric” chain unit of 66 feet divided into 100 “links”. Photo: Dept. of Main Roads, NSW.  
   1 inch 2.54 cm
1 chain 100 links/4rods 20.11metres
1 hand 4 inches 10.12cm
1 foot 12 inches 30.5cm
1 yard 2 feet 0.19metre
1 mile 5280feet 1.61 kilmetres
 
 
1 acre 4 roods/160 perches 0.405 hectres
1 square mile 2.59 square kilometres 10 square chains
1 chain 100 links/4rods 20.11 metres
     
2.47 acres 1 hectare 10,000 sq metres
     
     
1 pound   0.45 45 kilograms
1 ton 220 pounds 1.02 tonnes
1 gallon   4.55 litres
1 bushel 8 gallons 36.4 litres
 
£1 pound   $2
1 penny   1 cent
12 pence (p or d) one shilling (s) 10 cents
20 shillings one pound 1 dollar
1 guinea 21 shillings 2 dollars 10 cents
in today's money, it means that £1 then was equivalent to about $400 now
32° Fahrenheit   0° Centrigrade