in² - Square Inch. Conversion Chart

This converter features contemporary units of area. There is also a special converter for historical units of area you might want to visit for ancient, medieval and other old units that are no longer used.
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1This is a conversion chart for square inch (British (Imperial) And U.S. System). To switch the unit simply find the one you want on the page and click it.
You can also go to the universal conversion page.
2Enter the value you want to convert (square inch). Then click the Convert Me button.
Your value gets instantly converted to all other units on the page.
3Now find the unit you want and get the conversion result next to it. It's your answer.

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  1. Enter the value of your unit (square inch).
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Your value (square inch, in²):
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Metric

square inch to square kilometer (km²)
square inch to hectare
square inch to decare
square inch to are (a)
square inch to square meter (m²)
square inch to square decimeter (dm²)
square inch to square centimeter (cm²)
square inch to square millimeter (mm²)
square inch to barn (b)
Units: square kilometer (km²)  / hectare  / decare  / are (a)  / square meter (m²)  / square decimeter (dm²)  / square centimeter (cm²)  / square millimeter (mm²)  / barn (b)
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British (Imperial) And U.S. System

square inch to township
square inch to square mile
square inch to homestead
square inch to acre
square inch to rood
square inch to square rod
square inch to perch
square inch to square yard (yd²)
square inch to square foot (ft²)
square inch to square mil (th²)
Units: township  / square mile  / homestead  / acre  / rood  / square rod  / perch  / square yard (yd²)  / square foot (ft²)  /  / square mil (th²)
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Historical Units Still In Use Today

Some older units managed to survive and are still used nowadays. They were rounded up in accordance to current measurements (either metric or imperial) while keeping their old names. For each of the units below we specify the country where it is in use.
square inch to dulum (дулум) of Bosnia and Herzegovina and Serbia
square inch to dynym or dylym of Albania
square inch to donum of Cyprus
square inch to skales (σκάλες) of Cyprus
square inch to stremma (στρέμμα) of Greece
square inch to Turkish stremma of Greece
square inch to dunam of Iraq
square inch to dunam (dönüm, دونم) of Turkey, Syria, Israel, Palestine, Jordan, Lebanon
square inch to old (pre 1928) dunam (dönüm, دونم) of Turkey, Syria, Israel, Palestine, Jordan, Lebanon
square inch to feddan (فدّان‎) of Egypt, Sudan, Syria, Sultanate of Oman
square inch to kirat (قيراط) of Egypt
square inch to manzana of Argentina
square inch to manzana of Belize
square inch to manzana of Costa Rica
square inch to manzana of Guatemala
square inch to manzana of Honduras
square inch to manzana of Nicaragua
square inch to cuadra of Argentina
square inch to cuadra of Chile
square inch to cuadra of Ecuador
square inch to cuadra of Paraguay
square inch to cuadra of Peru
square inch to cuadra of Uruguay
square inch to square vara of Panama and Columbia
square inch to square vara of Chile, Costa Rica, Dominican Republic, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Peru, São Tomé and Principe, Venezuela
square inch to square vara of Cuba
square inch to square vara of Argentina, Paraguay, Uruguay
square inch to square vara of Brazil
Units: dulum (дулум) of Bosnia and Herzegovina and Serbia  / dynym or dylym of Albania  / donum of Cyprus  / skales (σκάλες) of Cyprus  / stremma (στρέμμα) of Greece  / Turkish stremma of Greece  / dunam of Iraq  / dunam (dönüm, دونم) of Turkey, Syria, Israel, Palestine, Jordan, Lebanon  / old (pre 1928) dunam (dönüm, دونم) of Turkey, Syria, Israel, Palestine, Jordan, Lebanon  / feddan (فدّان‎) of Egypt, Sudan, Syria, Sultanate of Oman  / kirat (قيراط) of Egypt  / manzana of Argentina  / manzana of Belize  / manzana of Costa Rica  / manzana of Guatemala  / manzana of Honduras  / manzana of Nicaragua  / cuadra of Argentina  / cuadra of Chile  / cuadra of Ecuador  / cuadra of Paraguay  / cuadra of Peru  / cuadra of Uruguay  / square vara of Panama and Columbia  / square vara of Chile, Costa Rica, Dominican Republic, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Peru, São Tomé and Principe, Venezuela  / square vara of Cuba  / square vara of Argentina, Paraguay, Uruguay  / square vara of Brazil
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Units for Measuring Wire Gauges

These units are referring to the area of a wire with a circular cross section. One circular mil denote an area, equal to the area of a circle with a diameter of one mil.

You can find a comprehensive list of wire gauge units on our special wire gauge conversion page.

square inch to circular inch
square inch to thousand of circular mils (kcmil, MCM)
square inch to circular mil (cmil)
Units: circular inch  / thousand of circular mils (kcmil, MCM)  / circular mil (cmil)
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Japanese

square inch to shaku (勺)
square inch to go (合)
square inch to jo (畳)
square inch to tsubo (坪)
square inch to bu (歩)
square inch to se (畝)
square inch to tan (段, 反)
square inch to cho (町, 町歩)
Units: shaku (勺)  / go (合)  / jo (畳)  / tsubo (坪)  / bu (歩)  / se (畝)  / tan (段, 反)  / cho (町, 町歩)
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Chinese units of 1930

square inch to qing (頃 or 顷)
square inch to mu (畝 or 亩)
square inch to fen (市分)
square inch to fang zhang (方丈) (zhang²)
square inch to li (釐 or 厘)
square inch to hao (毫)
square inch to fang chi (方尺) (chi²)
square inch to fang cun (方寸) (cun²)
Units: qing (頃 or 顷)  / mu (畝 or 亩)  / fen (市分)  / fang zhang (方丈) (zhang²)  / li (釐 or 厘)  / hao (毫)  / fang chi (方尺) (chi²)  / fang cun (方寸) (cun²)
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Chinese units of 1915

square inch to qing (頃 or 顷)
square inch to mu (畝 or 亩)
square inch to fen (分)
square inch to fang zhang (方丈) (zhang²)
square inch to li (釐 or 厘)
square inch to hao (毫)
square inch to fang chi (方尺) (chi²)
square inch to fang cun (方寸) (cun²)
Units: qing (頃 or 顷)  / mu (畝 or 亩)  / fen (分)  / fang zhang (方丈) (zhang²)  / li (釐 or 厘)  / hao (毫)  / fang chi (方尺) (chi²)  / fang cun (方寸) (cun²)
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Thai units

Some of these units are still in use even though metric system was formally established in 1923. Before the metrication the old units were standartied to exact metric values.
square inch to rai (ไร่)
square inch to ngan (งาน)
square inch to tarang wah (ตารางวา, square wa)
Units: rai (ไร่)  / ngan (งาน)  / tarang wah (ตารางวา, square wa)
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Natural units

In physics, natural units are physical units of measurement based only on universal physical constants. The origin of their definition comes only from properties of nature and not from any human construct.
square inch to Planck area (L²)
Units: Planck area (L²)

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