Customary System – Definition with Examples

What does the 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.