U.S. customary units

The U.S. customary system of measurement is the measurement system used most commonly in the United States. It was brought to the U.S. by colonists from England. Many cultures, some of them dating back to ancient times, contributed to its development. The U.S. customary system includes units for measuring length, weight, capacity, area, volume, and temperature.

length

Commonly used units for measuring length in the U.S. customary system include inch (in), foot (ft), yard (yd), and mile (mi).

12 in = 1 ft

3 ft = 1 yd

5,280 ft or 1,760 yd = 1 mi

weight

Commonly used units for measuring weight in the U.S. customary system include ounce (oz), pound (lb), and ton (T).

16 oz = 1 lb

2,000 lb = 1 T

capacity

Commonly used units for measuring capacity in the U.S. customary system include teaspoon (t), tablespoon (T), cup (C), pint (pt), quart (qt), and gallon (gal).

3 t = 1 T

16 T = 1 C

2 C = 1 pt

2 pt = 1 qt

4 qt = 1 gal

Fluid ounces (fl oz) are also used for measuring capacity.

1 fl oz = 2 T

8 fl oz = 1 C

16 fl oz = 1 pt

32 fl oz = 1 qt

area

Square units are used for measuring area. In the U.S. customary system, these include in2, ft2, and yd2.

144 in2 = 1 ft2

9 ft2 = 1 yd2

Acres and mi2 are also used for measuring area.

1 acre = 43,560 ft2

640 acres = 1 mi2

volume

Cubic units are used for measuring volume. In the U.S. customary system these include in3, ft3, and yd3.

1,728 in3 = 1 ft3

27 ft3 = 1 yd3

temperature

The Fahrenheit (°F) scale is used for measuring temperature in the U.S. customary system. Two reference points for this temperature scale are:

32 °F the freezing point of water
212 °F the boiling point of water

Also called customary system, customary measurement system, English measurement system, English system of measurement, standard system of measurement, and U.S. customary system.

See also area, capacity, cubic unit, Fahrenheit, temperature scale, fluid ounces, feet, gallon, inch, length, metric system, miles, ounces, pint, pounds, quart, square unit, tablespoon, spoon, temperature, ton, volume, weight, yard.