Square inches

Physical unit
Unit name	Square inches
Unit symbol	${\ displaystyle \ mathrm {sqin}}$
Physical quantity (s)	surface
Formula symbol	${\ displaystyle A}$
dimension	${\ displaystyle {\ mathsf {L ^ {2}}}}$
system	Anglo-American system of measurement
In SI units	${\ displaystyle \ mathrm {1 \, sqin = 0 {,} 00064516m ^ {2}}}$
In CGS units	${\ displaystyle \ mathrm {1 \, sqin = 6 {,} 4516cm ^ {2}}}$
Derived from	inch
See also: square feet

A square inch , in the Anglo-American system of measurement (English square inch ), is a unit of area and corresponds to the area of a square with an edge length of one inch .

Since an inch is only 2.54 centimeters long in the Anglo-American system of measurement , a square inch has an area of 6.4516 square centimeters .

A foot is 12 inches long in this system, making one square foot 144 square inches .

See also