There are lots of mistakes in the imperial conversions.
1 mile is exactly 1760 yards, 5,280feet, 63,360 inches.
1 acre is exactly 4840 square yards, 43,560 square feet, 6,272,640 square inches.
1 Gallon is exactly 4 quarts, 8 pints,
There are three tons,
Metric Ton/Tonne (1000 Kg)
US Ton/Short...