The U.S. customary system of measurement is used throughout the United States, although the metric system is being phased in as well. You should be familiar with the following basic measurements of the U.S. customary system: Length 12 inches (in) = 1 foot (ft) 3 feet = 1 yard (yd) 36 inches = 1 yard 1,760 yards = 1 mile (mi) 5,280 feet = 1 mile Area 144 square inches (sq in) = 1 square foot (sq ft) 9 square feet = 1 square yard (sq yd) Weight 16 ounces (oz) = 1 pound (lb) 2000 pounds = 1 ton (T) Capacity 2 cups = 1 pint (pt) 2 pints = 1 quart (qt) 4 quarts = 1 gallon (gal) 4 pecks = 1 bushel Time 365 days = 1 year 52 weeks = 1 year 10 years = 1 decade 100 years = 1 century