Convert Area Units Instantly

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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Conversion settings explained

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Number of significat figures

Do you want rounded off figures or scientifically precise ones? For everyday conversions we recommend choosing 3 or 4 significant digits. If you want maximum precision, set the number to 9

Digit groups separator

Choose how you want to have your digit groups separated in long numbers:

1234567.89none
1 234 567.89space
1,234,567.89comma
1.234.567,89point

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  • Significant figures:
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Metric

square kilometer (km²)
hectare
decare
are (a)
square meter (m²)
square decimeter (dm²)
square centimeter (cm²)
square millimeter (mm²)
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

township
square mile
homestead
acre
rood
square rod
perch
square yard (yd²)
square foot (ft²)
square inch (in²)
square mil (th²)
Units: township  / square mile  / homestead  / acre  / rood  / square rod  / perch  / square yard (yd²)  / square foot (ft²)  / square inch (in²)  / 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.
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
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.

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

shaku (勺)
go (合)
jo (畳)
tsubo (坪)
bu (歩)
se (畝)
tan (段, 反)
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

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)
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

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)
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.
rai (ไร่)
ngan (งาน)
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.
Planck area (L²)
Units: Planck area (L²)

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