Customary units mainly deals with the length measurement. Length measurement is important for lots of different reasons. Measurement of length have lots of applications in real life, like it helps you to know how far you have traveled, how far you have left to travel, how tall you are, distance and many other things.
International System of Units (abbreviated SI) are the units followed by people all over the world. meter (or meter), symbol m, is the base unit of length. By adding prefixes like Kilo(10³) , milli(10-3) etc. We get derived units kilometer, millimeter respectively.
The system for measuring length in the United States is called customary system based on the inch, foot, yard, and mile, which are the only four customary length measurements in their everyday use.
Customary units are measurements used in USA. The measures of inches, foot, yards, chains, furlongs, miles and league are few examples.
The system of measuring standard for base quantity like length, mass, time etc is known as measuring system. There are following measuring systems in use as tabulated below -
|S.No||System's Name||Unit of Length||Unit of Length||Unit Of Times|
|1||CGS System||Centimeter (cm )||Gram ( gm )||Second ( s )|
|2||MKS System||Metre ( m )||Kilogram ( Kg )||Second ( s )|
|3||FPS System||Foot ( ft )||Pound ( lb )||Second ( s )|
|4||SI system||Metre ( m )||Kilogram ( Kg )||Second ( s )|
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Today metric system rules the world because it is easy to calculate. Yet USA uses these old measures.
3 feet = 1 yard
22 yards = 1 chain
10 chains = 1 furlong
8 furlongs = 1 mile
3 miles = 1 league
5.5 yards = 1 rod = 1pole = 1 perch
40 rods = 1 furlong.
The customary units of measurement include ounces, pint, quarter and gallons
8 flood ounces = 1 cup
2 cups = 1 pint
2 pints = 1 quarter
4 quarters = 1 gallon
1 ounce = 2 tablespoons
1 tablespoon = 3 teaspoons
16 ounces = 1 pound
Customary units can be converted from one unit to the other.
when 8 oz = 1 cup
and 2 cups = 1 pint,
we can convert 16 oz to 1 pint.
Similarly: 1 gallon= 4 (quarts) = 8 (pints) = 16 (cups) = 128 fl oz
We can convert customary unit to metric units by the following expressions.
1 oz = 30 ml(milliliter)
1 oz = 28.35 grams
1 gallon = 128 oz = 4.55 liter
2,000 pounds = 1 ton = 1,016 Kg.
Likewise, we can convert 12 inches = 0.30 m
1 furlong = 1.6 km
80 chains = 1 mile
792 inches = 1 chain
7,920 inches= 1 furlong
63,360 inches = 1 mile
1 rod = 5.03 m
1 light year = 1,86,282 miles / sec
= 2,99,792.5 km/sec
we can say 1 acre = 4,840 sq .yards
= 43,560 sq. ft.
1 sq. mile = 640 acres
= 252 hectares
100 ares = 2.471 acres
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