Imperial System, Units of Measurement

Lenght

• 1 foot (ft) = 12 inches (in)
• 1 yard (yd) = 3 feet (ft)
• 1 mile = 1760 yards
• 1 link = 7.92 inches
• 1 rod, pole or perch = 25 links
• 1 chain = 22 yards = 4 rods

Area

• 1 ft² = 144 in²
• 1 yd² = 9 ft²
• 1 acre = 4840 yd²
• 1 mile² = 640 acres

Volume

• 1 ft³ = 1728 inch³
• 1 pint (British) = 4 gills
• 1 dry pint (USA only) = 16 fluid ounces
• 1 yard³ = 27 feet³
• 1 gallon = 8 pints

Mass

• 1 pound = 16 ounces
• 1 stone = 14 pounds
• 1 quarter = 2 stones
• 1 ton = 2240 pounds