Types of Measurements

Units tell us two important things about the object being measured—what is being measured and its size. Are you measuring capacity, weight, length, or temperature? And how big, heavy, long, or hot is the object? For each type of measurement, you must use an appropriate unit of measurement. For example, you might use grams to measure weight, liters to measure capacity, degrees to measure temperature, feet to measure height, and so on.

Today, there are two major systems of measurement. The U.S. customary system is used in everyday life in the United States. The following are the types of measurements used most frequently in the United States:

Units of Length

1 foot (ft.) = 12 inches (in.)

1 yard (yd.) = 3 feet = 36 inches

1 mile (mi.) = 1,760 yards = 5,280 feet

1 square foot (ft.2) = 144 square inches (in.2)

1 square yard (yd.2) = 9 square feet

1 square mile (mi.2) = 640 acres = 3,097,600 square yards

1 acre (A) = 4,840 square yards = 43,560 square feet

1 cubic foot (ft.3) = 1,728 cubic inches (in.3) ≈* 7.48 gallons

1 cubic yard (yd.3) = 27 cubic feet

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