Customary System - Definition with Examples

The Complete K-5 Math Learning Program Built for Your Child

  • 30 Million Kids

    Loved by kids and parent worldwide

  • 50,000 Schools

    Trusted by teachers across schools

  • Comprehensive Curriculum

    Aligned to Common Core

let's learn Let's learn!

What does customary system mean?
The customary system of measurement, also called the U.S. Customary System, is based on the English system of measurement. 
In math, the customary system can be defined as a set of weights and measures used for measuring length, weight, capacity and temperature. 
 

Length and distances in the customary system are measured in inches, feet, yards and miles.

 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
 
The U.S. customary weight measurement units are ounces, pounds, and tons. 
 
 Customary Unit  Customary Equivalent  Standard Metric Equivalent
 1 ounce  16 drams  28.349523125 grams
 1 pound  16 ounces  453.59237 grams
 1 ton  2000 pounds  907.18474 kilograms
 
The U.S customary capacity or volume measurement units are ounces, cups, pints, quarts, and gallons. 
 
 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 pins  0.946352946 liters
 1 gallon  4 quarts  3.785411784 liters
 
The U.S customary temperature measurement unit is degree Fahrenheit.  
1 Degree Celsius = 33.8 Degree Fahrenheit
 

  Fun Facts

  • Customary system is called the International System of Units or the Modern Metric System.
 

let's do it Let's do it!

Instead of handing our word problem worksheets to your child, site real life instances  in which the child is required to measure length, weight or capacity and convert bigger customary units into smaller units or convert metric units into customary units and vice versa. 
 

related math vocabulary Related math vocabulary

 
Won Numerous Awards & Honors
Awards honors badge