US Units

Distance
1 mile = 8 furlong
1 furlong = 10 chain
1 chain = 22 yard
1 yard = 3 feet
1 foot = 12 inch
1 inch = 25.4mm

Volume
1 barrel = 42 gallon
1 gallon = 128 oz
1 oz = 29.5735 ml

Mass
1 pound = 16 oz
1 US ton = 2000 lb