Customary Units
Customary system
The customary system of measurement is defined as a set of weights and measures used for measuring length, weight, capacity, and temperature. Based on the English system of measurement, it is also known as the U.S. Customary System.
Customary Units for Length
The customary units to measure length and distances in the customary system are inches, feet, yards, and miles.
Customary Units for Measuring Length 

Inches 
Feet 
Yards 
Miles 
We can use the given chart for conversion of one customary unit of length to another.
Example: Convert 5 foot to inches.
1 foot = 12 inches
5 foot = 12 × 5 = 60 inches
The table given below shows the relation between customary units and standard metric units.
Customary Unit 
Customary Equivalent 
Standard Metric Equivalent 
1 inch 
 
2.54 centimeters 
1 foot 
12 inches 
0.3048 meters 
1 yard 
3 feet 
0.9144 meters 
1 mile 
1760 yards 
1.609 344 kilometers 
Customary Units for Weight
The U.S. customary units for measuring weight are ounces, pounds, and tons.
Customary Units for Measuring Weight 

Ounces 
Pound 
Ton 
We can convert the customary unit of weight by using the giving relations.
Example: How many ounces are there in 1 ton?
1 ton = 2000 pounds
1 pound = 16 ounces
So, 2000 pounds = 2000 × 16 = 32000 ounces
Customary Unit 
Customary Equivalent 
Standard Metric Equivalent 
1 ounce 
 
28.349523125 grams 
1 pound 
16 ounces 
453.59237 grams 
1 ton 
2000 pounds 
907.18474 kilograms 
Customary Units for Capacity (Volume)
The U.S. customary capacity or volume measurement units are ounces, cups, pints, quarts, and gallons.
Customary Units for Measuring Capacity (Volume) 

Fluid Ounce  Cup  Pint  Quart 
Gallon 
Example: Convert 3 quarts to cups.
1 quart = 2 pints
2 quarts = 6 pints
1 pint = 6 cups
6 pints = 6 × 6 = 12 cups
Customary Unit 
Customary Equivalent 
Standard Metric Equivalent 
1 fluid ounce 
2 tablespoons 
29.5735295625 milliliters 
1 cup 
8 fluid ounces 
0236.5882365 milliliters 
1 pint 
2 cups 
473.176473 milliliters 
1 quart 
2 pints 
0.946352946 liters 
1 gallon 
4 quarts 
3.785411784 liters 
Customary Units for Temperature
The U.S. customary measurement unit for temperature is °Fahrenheit.
1 °C = 33.8 °F
Fun Facts
