Wikipedia / Cubic inch
Wikipedia / Cubic inch
The cubic inch (symbol in3), sometimes abbreviated cu in, is a unit of volume in the Imperial units and United States customary units systems. It is the volume of a cube with each of its three dimensions (length, width, and height) being one inch long which is equivalent to of a US gallon.
The cubic inch and the cubic foot are used as units of volume in the United States, although the common SI units of volume, the liter, milliliter, and cubic meter, are also used, especially in manufacturing and high technology. One cubic inch is exactly .
One cubic foot is equal to exactly , as 123 = 1728.
Notation conventions
The following abbreviations have been used to denote the cubic inch: cubic in, cu inch, cu in, cui, cu. in.
The IEEE standard symbol is: in3
In internal combustion engines, the following abbreviations are used to denote cubic inch displacement: c.i.d., cid, CID, c.i., ci
The National Electrical Code established the cubic inch as the conventional unit in North America for measuring the usable volume of electrical boxes. A "cu in" rating is embossed on each box.
Equivalence with other units of volume
One cubic inch is equal to:
Exactly cubic feet
Exactly US gallon
Exactly US liquid quart
Exactly US liquid pint
Exactly US gill
Exactly US fluid ounce
Exactly US tablespoons
Exactly US teaspoons
Exactly US fluid drams
Exactly US bushel
Exactly US dry quart
Exactly US dry pint
≈0.00360465 imperial gallons
≈0.0144186 imperial quarts
≈0.0288372 imperial pints
≈0.1153488 imperial gills
≈0.576744 imperial fluid ounces
≈1.153488 imperial tablespoons
≈4.613952 imperial fluid drams
≈0.00045058 imperial bushels
Exactly barrel of crude oil
Exactly
See also
References