Square inch
square inch | |
---|---|
Unit system | Imperial, United States customary units |
Unit of | area |
Symbol | in2, sq in |
Conversions | |
1 in2 in ... | ... is equal to ... |
Imperial/US | 1/144 sq ft |
SI units |
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A square inch (plural: square inches) is a unit of area, equal to the area of a square with sides of one inch. The following symbols are used to denote square inches:
- square in
- sq inches, sq inch, sq in
- inches/-2, inch/-2, in/-2
- inches^2, inch^2, in^2
- inches2, inch2, in2 (also denoted by "2)
- historic engineering drawings □″ (number with a square & a double apostrophe, both as an exponent)
The square inch is a common unit of measurement in the United States and the United Kingdom. A common unit of pressure, pound per square inch (psi) is derived from this unit of area.
Equivalence with other units of area
1 square inch (assuming an international inch) is equal to: (the overbars indicate repeating decimals)
- 0.006 94 square feet (1 square foot is equal to 144 square inches)
- 0.000 771 604 9382 square yards (1 square yard is equal to 1,296 square inches)
- 6.4516 square centimetres (1 square centimetre is equal to 0.155 000 310... square inches)
- 0.000 645 16 square metres (1 square metre is equal to 1,550.003 100... square inches)
- v
- t
- e
Imperial units
- Twip
- Thousandth of an inch
- Barleycorn
- Inch
- Hand (unit)
- Foot
- Yard
- Chain
- Gunter's chain
- Furlong
- Mile
- League
- Fathom
- Cable
- Nautical Mile
- Link
- Rod
- Square inch
- Square foot
- Square yard
- Perch
- Rood
- Acre
- Square mile
Derived | |
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Cooking | |
Other |
- Grain
- Drachm
- Ounce
- Pound (mass)
- Stone
- Quarter
- Slug
- Long hundred
- Hundredweight
- Ship load
- Ton
- British thermal unit
- Degree
- Fahrenheit
- Rankine
- Foot-candle
- Foot-pound
- Foot-poundal
- Horsepower
- Horsepower-hour
- Kenning
- Pound (force)
- Pound-foot
- Poundal
- Span
- Spinning count