Convert customary length units

Customary length conversion represents the same distance in different units by using fixed equivalences: 12 inches equal 1 foot, 3 feet equal 1 yard, and 5,280 feet equal 1 mile. Quantities can therefore be converted by multiplying when moving to a smaller unit and dividing when moving to a larger unit, while preserving the measured length and labeling the result; this scope centers on whole-number measurements and does not include metric conversions or generalized decimal conversion rates.