Square inches (in²)
The square inch is the area of a square one inch on each side, exactly 6.4516 square centimeters.
Convert square inches to any area unit
1 square inch = 0.00064516 square meters
Quick facts
- Unit
- Square inch (plural: square inches)
- Symbol
- in²
- Measures
- Area
- System
- US & imperial
- Equals
- 0.00064516 square meters
- Definition
- The area of a square with 1-inch sides: exactly 6.4516 cm².
- Also written
- sq in, in2
1 square inch in other units
| Square meters | 0.00064516 m² |
| Square feet | 0.006944444444 ft² |
| Acres | 1.5942251 × 10-7 ac |
| Hectares | 6.4516 × 10-8 ha |
| Square kilometers | 6.4516 × 10-10 km² |
| Square miles | 2.4909767 × 10-10 mi² |
| Square centimeters | 6.4516 cm² |
| Square yards | 0.000771604938 yd² |
What is a square inch?
The square inch is the area of a square one inch on each side, exactly 6.4516 square centimeters. It is used for small surfaces and, through pounds per square inch (psi), for pressure.
Where the square inch sits among area units
The square inch is number 13 of 112 on our scale of area units, ordered from smallest to largest.
Square inches in real life
- A US postage stamp is about 1 in²
- A credit card is about 7.2 in²
One square inch is about 1.3 postage stamps, or about 14% of a credit card.
Top square inch conversions
- Square inches to square meters
- Square inches to square feet
- Square inches to acres
- Square inches to hectares
- Square inches to square kilometers
- Square inches to square miles
- Square inches to square centimeters
- Square inches to square yards
- Square inches to square millimeters
- Square inches to pyeong
- Square inches to bighas
- Square inches to mu
Common amounts of square inches
- 0.25 in²
- 0.5 in²
- 0.75 in²
- 1 in²
- 1.5 in²
- 2 in²
- 2.5 in²
- 3 in²
- 4 in²
- 5 in²
- 6 in²
- 7 in²
- 8 in²
- 9 in²
- 10 in²
- 11 in²
- 12 in²
- 13 in²
- 14 in²
- 15 in²
- 16 in²
- 17 in²
- 18 in²
- 19 in²
- 20 in²
- 21 in²
- 22 in²
- 23 in²
- 24 in²
- 25 in²
- 26 in²
- 27 in²
- 28 in²
- 29 in²
- 30 in²
- 31 in²
- 32 in²
- 33 in²
- 34 in²
- 35 in²
- 36 in²
- 37 in²
- 38 in²
- 39 in²
- 40 in²
- 41 in²
- 42 in²
- 43 in²
- 44 in²
- 45 in²
- 46 in²
- 47 in²
- 48 in²
- 49 in²
- 50 in²
- 60 in²
- 70 in²
- 80 in²
- 90 in²
- 100 in²
- 150 in²
- 200 in²
- 250 in²
- 300 in²
- 400 in²
- 500 in²
- 750 in²
- 1,000 in²
Convert square inches to all 111 other units
Metric
US & imperial
- in² to ft²
- in² to ac
- in² to mi²
- in² to yd²
- in² to cmil
- in² to roofing square
- in² to section
- in² to rd²
- in² to US survey acre
- in² to rood
- in² to ch²
- in² to mil²
- in² to township
- in² to homestead
- in² to Irish acre
- in² to Scottish acre
- in² to circular inch
- in² to Cheshire acre
East & Southeast Asian
- in² to 평
- in² to 亩
- in² to 坪
- in² to ไร่
- in² to 坪
- in² to งาน
- in² to ตร.ว.
- in² to 顷
- in² to 町
- in² to 甲
- in² to 反
- in² to 分
- in² to 단보
- in² to 정보
- in² to 畝
- in² to 厘
- in² to 合
- in² to 分
- in² to 마지기
- in² to square chi
South Asian
- in² to bigha
- in² to kanal
- in² to marla
- in² to cent
- in² to kattha
- in² to guntha
- in² to biswa
- in² to ground
- in² to ankanam
- in² to chatak
- in² to dhur
- in² to killa
- in² to murabba
European & Middle Eastern
- in² to dunam
- in² to feddan
- in² to arpent
- in² to Morgen
- in² to Joch
- in² to desyatina
- in² to jerib
- in² to qirat
- in² to Tagwerk
- in² to square perch (French)
- in² to square sazhen
- in² to square versta
Latin American
- in² to manzana
- in² to alqueire paulista
- in² to alqueire mineiro
- in² to v²
- in² to cuadra (area)
- in² to fanega (area)
- in² to tarea
- in² to alqueire baiano
- in² to caballeria
- in² to square braca
Ancient
- in² to jugerum
- in² to aroura
- in² to centuria
- in² to actus
- in² to heredium
- in² to saltus
- in² to square Roman foot
- in² to square plethron
Scientific
Everyday comparisons
Convert to square inches
- Square meters to square inches
- Square feet to square inches
- Acres to square inches
- Hectares to square inches
- Square kilometers to square inches
- Square miles to square inches
- Square centimeters to square inches
- Square yards to square inches
- Square millimeters to square inches
- Pyeong to square inches
- Bighas to square inches
- Mu to square inches
Frequently asked questions
What is a square inch?
The square inch is the area of a square one inch on each side, exactly 6.4516 square centimeters.
How is the square inch defined?
The area of a square with 1-inch sides: exactly 6.4516 cm².
How many square meters are in a square inch?
One square inch equals 0.00064516 square meters.
How many square feet are in a square inch?
One square inch equals 0.006944444444 square feet.
How many acres are in a square inch?
One square inch equals 1.5942251e-7 acres.